C312312111111331312111133133313331333133313231333132233133322311   >>    C31231211111133131211113313331333133313331323133313223313332231   <<    C312312111111331312111133133313331333133313231333132233133322313   >>      C312312111111331312111133133313331333133313231333132233133322312   >>