C21221212121211331313233313131133132312111133131322331323211211   >>    C2122121212121133131323331313113313231211113313132233132321121   <<    C21221212121211331313233313131133132312111133131322331323211213   >>      C21221212121211331313233313131133132312111133131322331323211212   >>