ViolentKnottyLing

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f=->s{2**(z=0..5).max_by{|j|z.map{|i|s[b="lucky"[i,j]]?b.size: 0}.max}-2*s.count("omen")}

input = "lucky
firetruck
ummm
memes"

input.lines.each {|s| puts f[s]}