C11111211113313112113313331333133313133313232233133313121111113213221   >>    C1111121111331311211331333133313331313331323223313331312111111321322   <<    C11111211113313112113313331333133313133313232233133313121111113213223   >>      C11111211113313112113313331333133313133313232233133313121111113213222   >>