"use strict";
function Main(input) {
    const sumInput = input.split(" ").map(i => Number(i)).reduce((accum, current) => current + accum);
    console.log(55 - sumInput);
}
//テストの入力を受け取る
Main(require("fs").readFileSync("/dev/stdin", "utf8"));
//Main("1 3 4 5 6 7 8 9 10");
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