C111123313331323113313331333133313331323131211113313121111121312321311   >>    C11112331333132311331333133313331333132313121111331312111112131232131   <<    C111123313331323113313331333133313331323131211113313121111121312321313   >>      C111123313331323113313331333133313331323131211113313121111121312321312   >>