C21221212121211331313233313131133132333132313223313231321123232331   >>    C2122121212121133131323331313113313233313231322331323132112323233   <<    C21221212121211331313233313131133132333132313223313231321123232333   >>      C21221212121211331313233313131133132333132313223313231321123232332   >>