C11122123231323131323131323132322331313232313231333132322212231   >>    C1112212323132313132313132313232233131323231323133313232221223   <<    C11122123231323131323131323132322331313232313231333132322212233   >>      C11122123231323131323131323132322331313232313231333132322212232   >>