C11111211113313112113313331333133313133313232233133313231323133313331322311321   >>    C1111121111331311211331333133313331313331323223313331323132313331333132231132   <<    C11111211113313112113313331333133313133313232233133313231323133313331322311323   >>      C11111211113313112113313331333133313133313232233133313231323133313331322311322   >>