C1111233131211111211113313331333132313231323223313331311331231231   >>    C111123313121111121111331333133313231323132322331333131133123123   <<    C1111233131211111211113313331333132313231323223313331311331231233   >>      C1111233131211111211113313331333132313231323223313331311331231232   >>