C312312111111331312111133133313331333133313231333132322123232321   >>    C31231211111133131211113313331333133313331323133313232212323232   <<    C312312111111331312111133133313331333133313231333132322123232323   >>      C312312111111331312111133133313331333133313231333132322123232322   >>