C123122131323132313113313133313123231333132313112331323223313232212221   >>    C12312213132313231311331313331312323133313231311233132322331323221222   <<    C123122131323132313113313133313123231333132313112331323223313232212223   >>      C123122131323132313113313133313123231333132313112331323223313232212222   >>