C11111211113313112113313331333133313133313232233131121133132213311   >>    C1111121111331311211331333133313331313331323223313112113313221331   <<    C11111211113313112113313331333133313133313232233131121133132213313   >>      C11111211113313112113313331333133313133313232233131121133132213312   >>