C21221212121211331313233313131133132333132313223313233311233131   >>    C2122121212121133131323331313113313233313231322331323331123313   <<    C21221212121211331313233313131133132333132313223313233311233133   >>      C21221212121211331313233313131133132333132313223313233311233132   >>