C1111121111331311211331333133313331333133313231333133313331333121111112233221   >>    C111112111133131121133133313331333133313331323133313331333133312111111223322   <<    C1111121111331311211331333133313331333133313231333133313331333121111112233223   >>      C1111121111331311211331333133313331333133313231333133313331333121111112233222   >>