C3121113331313231323132333131313231323131323223313233313232322221   >>    C312111333131323132313233313131323132313132322331323331323232222   <<    C3121113331313231323132333131313231323131323223313233313232322223   >>      C3121113331313231323132333131313231323131323223313233313232322222   >>