5 files changed, 47 insertions, 0 deletions
diff --git a/challenge-250/arne-sommer/blog.txt b/challenge-250/arne-sommer/blog.txt
new file mode 100644
index 0000000000..a90a27bace
--- /dev/null
+++ b/challenge-250/arne-sommer/blog.txt
@@ -0,0 +1 @@
+https://raku-musings.com/string-index.html
diff --git a/challenge-250/arne-sommer/raku/asv b/challenge-250/arne-sommer/raku/asv
new file mode 100755
index 0000000000..f2e2aa9868
--- /dev/null
+++ b/challenge-250/arne-sommer/raku/asv
@@ -0,0 +1,9 @@
+#! /usr/bin/env raku
+
+unit sub MAIN (*@alphanumstr where @alphanumstr.elems > 0, :v(:$verbose));
+
+my @values = @alphanumstr.map({ /^<[0..9]>+$/ ?? $_.Int !! $_.chars });
+
+say ":Values: { @values.join(",") }" if $verbose;
+
+say @values.max;
diff --git a/challenge-250/arne-sommer/raku/ch-1.raku b/challenge-250/arne-sommer/raku/ch-1.raku
new file mode 100755
index 0000000000..d684f19766
--- /dev/null
+++ b/challenge-250/arne-sommer/raku/ch-1.raku
@@ -0,0 +1,14 @@
+#! /usr/bin/env raku
+
+unit sub MAIN (*@ints where @ints.elems > 0 && all(@ints) ~~ Int);
+
+for ^@ints -> $i
+{
+  if $i % 10 == @ints[$i]
+  {
+    say $i;
+    exit;
+  }
+}
+
+say -1;
diff --git a/challenge-250/arne-sommer/raku/ch-2.raku b/challenge-250/arne-sommer/raku/ch-2.raku
new file mode 100755
index 0000000000..f2e2aa9868
--- /dev/null
+++ b/challenge-250/arne-sommer/raku/ch-2.raku
@@ -0,0 +1,9 @@
+#! /usr/bin/env raku
+
+unit sub MAIN (*@alphanumstr where @alphanumstr.elems > 0, :v(:$verbose));
+
+my @values = @alphanumstr.map({ /^<[0..9]>+$/ ?? $_.Int !! $_.chars });
+
+say ":Values: { @values.join(",") }" if $verbose;
+
+say @values.max;
diff --git a/challenge-250/arne-sommer/raku/smallest-index b/challenge-250/arne-sommer/raku/smallest-index
new file mode 100755
index 0000000000..d684f19766
--- /dev/null
+++ b/challenge-250/arne-sommer/raku/smallest-index
@@ -0,0 +1,14 @@
+#! /usr/bin/env raku
+
+unit sub MAIN (*@ints where @ints.elems > 0 && all(@ints) ~~ Int);
+
+for ^@ints -> $i
+{
+  if $i % 10 == @ints[$i]
+  {
+    say $i;
+    exit;
+  }
+}
+
+say -1;