APL/J言語：文字の頻出度表 text=: ' i sing of olaf glad and big' alph=: ' abcdefghijklmnopqrstuvwxyz' 10{.alph=/text 1 0 1 0 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0…