C11111211113313112113313331333132313331322132333133313331311331323133313312121   >>    C1111121111331311211331333133313231333132213233313331333131133132313331331212   <<    C11111211113313112113313331333132313331322132333133313331311331323133313312123   >>      C11111211113313112113313331333132313331322132333133313331311331323133313312122   >>