C11111211113313112113313331313331323133313331333133313232211211311   >>    C1111121111331311211331333131333132313331333133313331323221121131   <<    C11111211113313112113313331313331323133313331333133313232211211313   >>      C11111211113313112113313331313331323133313331333133313232211211312   >>