const rl = require("readline").createInterface({ input: process.stdin }); var iter = rl[Symbol.asyncIterator](); const readline = async () => (await iter.next()).value; void (async function () { // Write your code here while ((line = await readline())) { const num = +line; const a = 6; const b = 8; for (let i = Number.parseInt(num / 8); i >= 0; i--) { const j = (num - i * b) / a; if (Number.isInteger(j)) { console.log(i + j); return; } } console.log(-1) } })();