C111123313331323113313331333133313331323131211113313231323311321   >>    C11112331333132311331333133313331333132313121111331323132331132   <<    C111123313331323113313331333133313331323131211113313231323311323   >>      C111123313331323113313331333133313331323131211113313231323311322   >>