Processing line 1 interested in caggctcaggacttagcaa
Fail: Must contain other than atgc

Processing line 2 interested in cttagcaagaagttatgaaa
Fail: Must contain other than atgc

Processing line 3 interested in ggcycaggacttagcaaga
Fail: Must not be 19 characters long

Processing line 4 interested in caggacttagcaaoooaagtt
caggacttagcaaoooaagtt passes all criteria