diff --git a/nx01-x4o-fc18/src/main/java/org/x4o/fc18/FourCornerUnicodeDisplay.java b/nx01-x4o-fc18/src/main/java/org/x4o/fc18/FourCornerUnicodeDisplay.java
index 616fabf..8d3b25b 100644
--- a/nx01-x4o-fc18/src/main/java/org/x4o/fc18/FourCornerUnicodeDisplay.java
+++ b/nx01-x4o-fc18/src/main/java/org/x4o/fc18/FourCornerUnicodeDisplay.java
@@ -237,7 +237,7 @@ public class FourCornerUnicodeDisplay {
 		}
 		
 		@Override
-		public void strobeNCR1632(BigInteger denominator, BigInteger numerator) {
+		public void strobeNCR1632(BigInteger numerator, BigInteger denominator) {
 			List<Integer> math = new ArrayList<>();
 			FourCornerRecipe.toScriptSuperX18(math, numerator);
 			math.add(FCDotCDC1604DashP6.NY02_BAR_V_RIGHT.ordinal());
diff --git a/nx01-x4o-fc18/src/main/java/org/x4o/fc18/zion7/FourCornerZion7Candlelier.java b/nx01-x4o-fc18/src/main/java/org/x4o/fc18/zion7/FourCornerZion7Candlelier.java
index 00b9cb4..f462624 100644
--- a/nx01-x4o-fc18/src/main/java/org/x4o/fc18/zion7/FourCornerZion7Candlelier.java
+++ b/nx01-x4o-fc18/src/main/java/org/x4o/fc18/zion7/FourCornerZion7Candlelier.java
@@ -44,7 +44,7 @@ public interface FourCornerZion7Candlelier extends FourCornerZion7AlphaOmega {
 	//void strobeWordDozeger(BigInteger value); // up to 192 bit integer
 	
 	/// 1152 bit fractions of two 576 bit numbers.
-	void strobeNCR1632(BigInteger denominator, BigInteger numerator);
+	void strobeNCR1632(BigInteger numerator, BigInteger denominator);
 	
 	/// Octal sand walker, with an 72 to 576 bit mime-type rhythm header.
 	void strobeSandWalker(List<PrimordialOctal> rhythm);
@@ -66,7 +66,7 @@ public interface FourCornerZion7Candlelier extends FourCornerZion7AlphaOmega {
 		}
 		
 		@Override
-		default void strobeNCR1632(BigInteger denominator, BigInteger numerator) {
+		default void strobeNCR1632(BigInteger numerator, BigInteger denominator) {
 		}
 		
 		@Override
diff --git a/nx01-x4o-fc18/src/main/java/org/x4o/fc18/zion7/FourCornerZionStenoGrapher.java b/nx01-x4o-fc18/src/main/java/org/x4o/fc18/zion7/FourCornerZionStenoGrapher.java
index bcb27cf..932653d 100644
--- a/nx01-x4o-fc18/src/main/java/org/x4o/fc18/zion7/FourCornerZionStenoGrapher.java
+++ b/nx01-x4o-fc18/src/main/java/org/x4o/fc18/zion7/FourCornerZionStenoGrapher.java
@@ -85,7 +85,7 @@ public class FourCornerZionStenoGrapher {
 		}
 	
 		@Override
-		public void strobeNCR1632(BigInteger denominator, BigInteger numerator) {
+		public void strobeNCR1632(BigInteger numerator, BigInteger denominator) {
 			if (denominator.equals(BigInteger.ZERO)) {
 				throw new IllegalArgumentException("The denominator value ZERO is not allowed.");
 			}
diff --git a/nx01-x4o-fc18/src/main/java/org/x4o/fc18/zion7/FourCornerZionStenoLexer.java b/nx01-x4o-fc18/src/main/java/org/x4o/fc18/zion7/FourCornerZionStenoLexer.java
index 665d41c..baf3044 100644
--- a/nx01-x4o-fc18/src/main/java/org/x4o/fc18/zion7/FourCornerZionStenoLexer.java
+++ b/nx01-x4o-fc18/src/main/java/org/x4o/fc18/zion7/FourCornerZionStenoLexer.java
@@ -198,7 +198,7 @@ public class FourCornerZionStenoLexer {
 		for (int i = 0; i < numeratorBank.length; i++) {
 			numerator = numerator.add(BigInteger.valueOf(numeratorBank[i]).shiftLeft(i * 9));
 		}
-		handler.strobeNCR1632(denominator, numerator);
+		handler.strobeNCR1632(numerator, denominator);
 		// reset the bank after each fire
 		for (int i = 0; i < denominatorBank.length; i++) {
 			denominatorBank[i] = 0;
diff --git a/nx01-x4o-fc18/src/test/java/org/x4o/fc18/zion7/StenoGrapherTest.java b/nx01-x4o-fc18/src/test/java/org/x4o/fc18/zion7/StenoGrapherTest.java
index 1a86102..f88abd7 100644
--- a/nx01-x4o-fc18/src/test/java/org/x4o/fc18/zion7/StenoGrapherTest.java
+++ b/nx01-x4o-fc18/src/test/java/org/x4o/fc18/zion7/StenoGrapherTest.java
@@ -62,11 +62,11 @@ public class StenoGrapherTest {
 		FourCornerZion7Candlelier writerX06 = FourCornerZionStenoGrapher.writerX06(outX06);
 		FourCornerZion7Candlelier writerX18 = FourCornerZionStenoGrapher.writerX18(outX18);
 		BigInteger v1 = BigInteger.valueOf(123);
-		writerX06.strobeNCR1632(v1, BigInteger.ONE);
-		writerX18.strobeNCR1632(v1, BigInteger.ONE);
+		writerX06.strobeNCR1632(BigInteger.ONE, v1);
+		writerX18.strobeNCR1632(BigInteger.ONE, v1);
 		BigInteger v2 = BigInteger.valueOf(12345);
-		writerX06.strobeNCR1632(v2, BigInteger.ONE);
-		writerX18.strobeNCR1632(v2, BigInteger.ONE);
+		writerX06.strobeNCR1632(BigInteger.ONE, v2);
+		writerX18.strobeNCR1632(BigInteger.ONE, v2);
 		String resX06 = FourCornerUnicodeDisplay.text().renderFromInt18(outX06);
 		String resX18 = FourCornerUnicodeDisplay.text().renderFromInt18(outX18);
 		Assertions.assertEquals(resX18, resX06);
@@ -81,8 +81,8 @@ public class StenoGrapherTest {
 		FourCornerZion7Candlelier writerX18 = FourCornerZionStenoGrapher.writerX18(outX18);
 		for (int x = 1; x <= 1025; x++) {
 			BigInteger v = BigInteger.valueOf(x);
-			writerX06.strobeNCR1632(v, BigInteger.ONE);
-			writerX18.strobeNCR1632(v, BigInteger.ONE);
+			writerX06.strobeNCR1632(BigInteger.ONE, v);
+			writerX18.strobeNCR1632(BigInteger.ONE, v);
 		}
 		String resX06 = FourCornerUnicodeDisplay.text().renderFromInt18(outX06);
 		String resX18 = FourCornerUnicodeDisplay.text().renderFromInt18(outX18);
@@ -104,17 +104,17 @@ public class StenoGrapherTest {
 		BigInteger maxValue = new BigInteger("FFFFFFFFFFFFFFFFFF"+"FFFFFFFFFFFFFFFFFF"+"FFFFFFFFFFFFFFFFFF"+"FFFFFFFFFFFFFFFFFF"+"FFFFFFFFFFFFFFFFFF"+"FFFFFFFFFFFFFFFFFF"+"FFFFFFFFFFFFFFFFFF"+"FFFFFFFFFFFFFFFFFF", 16);
 		writerX06.strobeNCR1632(maxValue, maxValue);
 		Assertions.assertThrows(IllegalArgumentException.class, () -> {
-			writerX06.strobeNCR1632(maxValue.add(BigInteger.ONE), maxValue);
+			writerX06.strobeNCR1632(maxValue, maxValue.add(BigInteger.ONE));
 		});
 		Assertions.assertThrows(IllegalArgumentException.class, () -> {
-			writerX06.strobeNCR1632(maxValue, maxValue.add(BigInteger.ONE));
+			writerX06.strobeNCR1632(maxValue.add(BigInteger.ONE), maxValue);
 		});
 		writerX18.strobeNCR1632(maxValue, maxValue);
 		Assertions.assertThrows(IllegalArgumentException.class, () -> {
-			writerX18.strobeNCR1632(maxValue.add(BigInteger.ONE), maxValue);
+			writerX18.strobeNCR1632(maxValue, maxValue.add(BigInteger.ONE));
 		});
 		Assertions.assertThrows(IllegalArgumentException.class, () -> {
-			writerX18.strobeNCR1632(maxValue, maxValue.add(BigInteger.ONE));
+			writerX18.strobeNCR1632(maxValue.add(BigInteger.ONE), maxValue);
 		});
 	}
 }