C11111211113313112113313331333133313331333132322121111332212321   >>    C1111121111331311211331333133313331333133313232212111133221232   <<    C11111211113313112113313331333133313331333132322121111332212323   >>      C11111211113313112113313331333133313331333132322121111332212322   >>