(test 5 (repString "1001110011"))
(test 4 (repString "1110111011"))
(test 3 (repString "0010010010"))
(test 4 (repString "1010101010"))
(test 5 (repString "1111111111"))
(test NIL (repString "0100101101"))
(test 3 (repString "0100100"))
(test NIL (repString "101"))
(test 1 (repString "11"))
(test 1 (repString "00"))
(test NIL (repString "1"))
(test NIL (repString "0100101"))