C1111133313331323223313331333133313331211111313231323132313112121   >>    C111113331333132322331333133313331333121111131323132313231311212   <<    C1111133313331323223313331333133313331211111313231323132313112123   >>      C1111133313331323223313331333133313331211111313231323132313112122   >>