W3KIP2L5QGNVA5B5I2L3GXTQU4CLMGL3BJJ45VHS4IYWVL23JCWQC
X2DMVRODPMRRYM3UUH7W2QO7SNZ4QNT4G7AVTKGYVLOSH5UIXLBQC
_, exists := hist[nucleotide] if !exists {
_, exists := hist[nucleotide]
if !exists {
if _, exists := hist[nucleotide]; !exists {