C11111211113313112113313331333133313231121131211113313221132211   >>    C1111121111331311211331333133313331323112113121111331322113221   <<    C11111211113313112113313331333133313231121131211113313221132213   >>      C11111211113313112113313331333133313231121131211113313221132212   >>