Initial data commit

Task/Nth/Sidef/nth.sidef

@@ -0,0 +1,8 @@
+func nth(n) {
+    static irregulars = Hash(<1 ˢᵗ 2 ⁿᵈ 3 ʳᵈ 11 ᵗʰ 12 ᵗʰ 13 ᵗʰ>...)
+    n.to_s + (irregulars{n % 100} \\ irregulars{n % 10} \\ 'ᵗʰ')
+}
+
+for r in [0..25, 250..265, 1000..1025] {
+    say r.map {|n| nth(n) }.join(" ")
+}