2 files changed, 29 insertions, 0 deletions
diff --git a/challenge-277/mark-anderson/raku/ch-1.raku b/challenge-277/mark-anderson/raku/ch-1.raku
new file mode 100644
index 0000000000..108d7c9b59
--- /dev/null
+++ b/challenge-277/mark-anderson/raku/ch-1.raku
@@ -0,0 +1,16 @@
+#!/usr/bin/env raku
+use Test;
+
+is count-common(<Perl is my friend>, 
+                <Perl and Raku are friend>),              2;
+
+is count-common(<Perl and Python are very similar>,
+                <Python is top in guest languages>),      1;
+
+is count-common(<Perl is imperative Lisp is functional>,
+                <Crystal is similar to Ruby>),            0;
+
+sub count-common(@words1, @words2)
+{
+    (@words1.grep(@words1.one) (&) @words2.grep(@words2.one)).elems
+}
diff --git a/challenge-277/mark-anderson/raku/ch-2.raku b/challenge-277/mark-anderson/raku/ch-2.raku
new file mode 100644
index 0000000000..480fb6932c
--- /dev/null
+++ b/challenge-277/mark-anderson/raku/ch-2.raku
@@ -0,0 +1,13 @@
+#!/usr/bin/env raku
+use Test;
+
+is strong-pair([1,2,3,4,5]), 4;
+is strong-pair([5,7,1,7]),   1;
+
+sub strong-pair(@ints)
+{
+    @ints.unique
+         .combinations(2)
+         .grep({ 0 < abs(.[0] - .[1]) < min(.[0], .[1]) })
+         .elems
+}