C11122123231323131323131323132322331313232313231333132322132313233311231   >>    C1112212323132313132313132313232233131323231323133313232213231323331123   <<    C11122123231323131323131323132322331313232313231333132322132313233311233   >>      C11122123231323131323131323132322331313232313231333132322132313233311232   >>