C11111211113313112113313331333131133133313112211232322123232321   >>    C1111121111331311211331333133313113313331311221123232212323232   <<    C11111211113313112113313331333131133133313112211232322123232323   >>      C11111211113313112113313331333131133133313112211232322123232322   >>