import rey=r"(?:AA[TCG]).{19}"x=raw_input('GET STRING:: ');l= re.findall(y,x)for x in l: print x print len(x)
ATGGAATCTTGTGATTGCATTGACACGCCATGCCCTGGTGAAGAACTCTTAGTGAAATATCAGTATATCT
GET STRING:: AATCTTGTGATTGCATTGACAC 22 AAGAACTCTTAGTGAAATATCA 22
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