C3123121111113313121111331333133313331333231323223313113313233221   >>    C312312111111331312111133133313331333133323132322331311331323322   <<    C3123121111113313121111331333133313331333231323223313113313233223   >>      C3123121111113313121111331333133313331333231323223313113313233222   >>