C11111211113313112113313331333133313331333132313331333133313232233133313222121   >>    C1111121111331311211331333133313331333133313231333133313331323223313331322212   <<    C11111211113313112113313331333133313331333132313331333133313232233133313222123   >>      C11111211113313112113313331333133313331333132313331333133313232233133313222122   >>