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void main() {
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import std.stdio, std.ascii, std.algorithm, std.range;
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uint[26] frequency;
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foreach (const buffer; "unixdict.txt".File.byChunk(2 ^^ 15))
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foreach (immutable c; buffer.filter!isAlpha)
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frequency[c.toLower - 'a']++;
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writefln("%(%(%s, %),\n%)", frequency[].chunks(10));
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}
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