C111123313331323113313331333133313331323133113313231333133313121133121   >>    C11112331333132311331333133313331333132313311331323133313331312113312   <<    C111123313331323113313331333133313331323133113313231333133313121133123   >>      C111123313331323113313331333133313331323133113313231333133313121133122   >>