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 cc18a8a..f0f4ed2 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
@@ -156,10 +156,6 @@ public class FourCornerUnicodeDisplay {
 				output.appendCodePoint(FCDotPIE9DDash09.IMG_ESC_DEC.codePointDotIndex());
 			}
 			// TODO: rm after file loading
-			if (FourCornerDotCake.FC_UWU0101_S1.equals(slice)) {
-				output.append("1");
-				return true;
-			}
 			if (FourCornerDotCake.FC_F4TXT0001_SP.equals(slice)) {
 				output.appendCodePoint(' ');
 				return true;
diff --git a/nx01-x4o-fc18/src/test/java/org/x4o/fc18/cake2/gram5/FCNumberGramTest.java b/nx01-x4o-fc18/src/test/java/org/x4o/fc18/cake2/gram5/FCNumberGramTest.java
index a4e383a..5c0325d 100644
--- a/nx01-x4o-fc18/src/test/java/org/x4o/fc18/cake2/gram5/FCNumberGramTest.java
+++ b/nx01-x4o-fc18/src/test/java/org/x4o/fc18/cake2/gram5/FCNumberGramTest.java
@@ -53,6 +53,9 @@ public class FCNumberGramTest {
 	public void testCutArguFail() throws Exception {
 		List<Integer> out = new ArrayList<>();
 		FourCornerZion7Candlelier writer = FourCornerZionStenoGrapher.writerX18(out);
+		Assertions.assertThrows(IllegalArgumentException.class, () -> {
+			writer.strobeNumberGrams(FourCornerZion7NumberGram.CUT_10, List.of(10));
+		});
 		Assertions.assertThrows(IllegalArgumentException.class, () -> {
 			writer.strobeNumberGrams(FourCornerZion7NumberGram.CUT_10, List.of(11));
 		});