C111123313121111121111331333133313331333131113211331323133313232212231231   >>    C11112331312111112111133133313331333133313111321133132313331323221223123   <<    C111123313121111121111331333133313331333131113211331323133313232212231233   >>      C111123313121111121111331333133313331333131113211331323133313232212231232   >>