C11122123231323131323131323132322331313232313231333132313211231   >>    C1112212323132313132313132313232233131323231323133313231321123   <<    C11122123231323131323131323132322331313232313231333132313211233   >>      C11122123231323131323131323132322331313232313231333132313211232   >>