C111123313331323113313331333133313331323133112113313113313231311233113211331   >>    C11112331333132311331333133313331333132313311211331311331323131123311321133   <<    C111123313331323113313331333133313331323133112113313113313231311233113211333   >>      C111123313331323113313331333133313331323133112113313113313231311233113211332   >>