String Pattern Generator

First String: prefix + char_a + char_a + prefix + char_a + char_a... (0 chars)
Pattern: nnaannabnn...aznnbannbbnn...zznn
Second String: prefix + char_B + char_B + prefix + char_B + char_B... (0 chars)
Pattern: HHAAHHAB...AZHHBAHHBBHH...ZZHH
Third String: prefix + char_B + char_a + prefix + char_B + char_a... (0 chars)
Pattern: nnAannAbnn...AznnBannBbnn...Zznn
Custom Pattern Output (0 chars)
Pattern: [prefix][char1][char2][prefix][char1][char2]...