C111123313331323113313331333133313331322331313331311331323133321   >>    C11112331333132311331333133313331333132233131333131133132313332   <<    C111123313331323113313331333133313331322331313331311331323133323   >>      C111123313331323113313331333133313331322331313331311331323133322   >>