C111123313331323113313331333133313331323133112113313232212111111313331   >>    C11112331333132311331333133313331333132313311211331323221211111131333   <<    C111123313331323113313331333133313331323133112113313232212111111313333   >>      C111123313331323113313331333133313331323133112113313232212111111313332   >>