C111123313331323113313331333133313121111133112121111331323331123231232323321   >>    C11112331333132311331333133313331312111113311212111133132333112323123232332   <<    C111123313331323113313331333133313121111133112121111331323331123231232323323   >>      C111123313331323113313331333133313121111133112121111331323331123231232323322   >>