C21221212121211331313233313131323223313231321123123231323223311   >>    C2122121212121133131323331313132322331323132112312323132322331   <<    C21221212121211331313233313131323223313231321123123231323223313   >>      C21221212121211331313233313131323223313231321123123231323223312   >>