C11111211113313112113313331333133313331333132322121111331323133313131121   >>    C1111121111331311211331333133313331333133313232212111133132313331313112   <<    C11111211113313112113313331333133313331333132322121111331323133313131123   >>      C11111211113313112113313331333133313331333132322121111331323133313131122   >>