However, you may test your code on the following 8 random sequences to see if you can discover the planted motif "TCACGTTG" at offset 10. Since the expected number of occurrences of the motif in these sequences is 1/200, there is a good chance that a SIMPLE_CONSENSUS program finds it.
For your convenience, the fasta file for these 8 sequences is also available here.
>random0 AGGCCTGTCTCACGTTGTTCGCAGAACACAAAAATGGCTC >random1 GCGCCGCTCTCACGTTGTAGTGGCGAGGAGCAGCAGCTAG >random2 TTTTGGCACTCACGTTGCCCTATTGATTCGCACTTTACAT >random3 TGACGCTAGTCACGTTGCAGTAATAAGGGACAATTTATTA >random4 TATAATTGTTCACGTTGGGAAATGTCAACTCGTCTCGTAC >random5 CGGGCTTTATCACGTTGTCAAGTTCAGCTTTAGAACCCGT >random6 GCCTGCTCTTCACGTTGTCGTTACATGCGAAGCTCTATAA >random7 TGGCACTGCTCACGTTGCTGGCGACCGAGGGTGCGCTCTG