C312312111111331312111133133313231333133313112331323223313231322221   >>    C31231211111133131211113313331323133313331311233132322331323132222   <<    C312312111111331312111133133313231333133313112331323223313231322223   >>      C312312111111331312111133133313231333133313112331323223313231322222   >>