C21221212121211331313233313131133132333132313223313231333132221   >>    C2122121212121133131323331313113313233313231322331323133313222   <<    C21221212121211331313233313131133132333132313223313231333132223   >>      C21221212121211331313233313131133132333132313223313231333132222   >>