const fs = require('fs');

const input = fs.readFileSync(__dirname + '/input.txt', 'utf8');

const connections: { [key: string]: Array<string> }= {};

input.split("\n").forEach((conn: string) => {
    const [c1, c2] = conn.split('-');
    connections[c1] = [c2, ...(connections[c1] || [])]
    connections[c2] = [c1, ...(connections[c2] || [])]
});

const tCs = new Set;

for (let key in connections) {
    const conns = connections[key];
    if (key.startsWith('t')) {
        conns.forEach((c2) => {
            connections[c2].forEach((c3) => {
                if (connections[c3].includes(key)) {
                    const arr = [key, c2, c3];
                    arr.sort();
                    tCs.add(arr.join(','));
                }
            })
        })
    }
}

console.log(tCs, tCs.size);