Repeat unit CG/CG repeats 4 times in the reference sequence.
...GTGTGGCCGCTCGGGGAGGGGCCTCCCGGGGGCGGGGCCGGCCTGGTCCGCGCGGTGACGCGCCCTGCAGCCCCGAGCGAGCGAGCGAGCGAGCGAGTTG
CCGAGCGCGCCCCGTCCCTCGCGCGCGATGCTCCCCTGGACGGCGCTCGGCCTGGCCCTGAGCTTGCGGCTGGCGCTGGCGCGGAGCGGCGCGGAGCGCG
GTGAGTGCGGCGGGCGGCCGGGCCGGGGCTGGGGCTTCTGGTGACCG...