C21221212121211331313233313131133132333132313223313231133132322131   >>    C2122121212121133131323331313113313233313231322331323113313232213   <<    C21221212121211331313233313131133132333132313223313231133132322133   >>      C21221212121211331313233313131133132333132313223313231133132322132   >>