P:\test>gf -MIN=16 duptest.gf
Completed in 0.000209
Best match: >string1 - >string2. 17 characters starting at 0 and 0.
123456789 123456789 123456789 123456789 123456789 123456789 123456789
AAAAAAAAAAAAAAAAACCCCCCCCCCCCCCCCCCCCCCCCCCCCCCTTTTTTTTTTTTTTTTT
AAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAGGGGGGGGGGGGGGGGGGGGGGGGGGGGGGTTTTTTTTTTTTTTTTT
AAAAAAAAAAAAAAAAA