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+#!ruby.exe
+
+# Author: Robert DiCicco
+# Date: 31-JAN-2022
+# Challenge 150 Fibonacci Words (Ruby)
+
+a = '1234'
+b = '5678'
+
+# recursive routine to create fibonacci series, but using strings
+
+def Fib ( first, second)
+  val = first + second
+  puts val
+
+  # if new string length is less than 51, go another round using new combined string
+  if val.length < 51 then
+    Fib( second, val)
+  else
+    # return the string if length 51 or greater
+    return val
+  end
+
+end
+
+puts 'Fibonacci Words'
+puts a
+puts b
+
+# get the 51st character
+char = Fib(a,b)[50].chr
+puts "51st digit is " + char