C11111211113313112113313331333133313331333132313331333133313113313233113221   >>    C1111121111331311211331333133313331333133313231333133313331311331323311322   <<    C11111211113313112113313331333133313331333132313331333133313113313233113223   >>      C11111211113313112113313331333133313331333132313331333133313113313233113222   >>