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diff --git a/challenge-204/mark-anderson/raku/ch-1.raku b/challenge-204/mark-anderson/raku/ch-1.raku
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+#!/usr/bin/env raku
+use Test;
+
+ok monotonic-array(1,2,2,3);
+nok monotonic-array(1,3,2);
+ok monotonic-array(6,5,5,4);
+
+sub monotonic-array(*@a)
+{
+ return 1 if [<=] @a;
+ return 1 if [>=] @a;
+ return 0
+}