C123122131323132313113313133313123231333132313112331323223313232311321   >>    C12312213132313231311331313331312323133313231311233132322331323231132   <<    C123122131323132313113313133313123231333132313112331323223313232311323   >>      C123122131323132313113313133313123231333132313112331323223313232311322   >>