C111123313331323113313331333133313231323133312111112111111331322311312121   >>    C11112331333132311331333133313331323132313331211111211111133132231131212   <<    C111123313331323113313331333133313231323133312111112111111331322311312123   >>      C111123313331323113313331333133313231323133312111112111111331322311312122   >>