40. 万能单词拼写-掌握单词个数

const readline = require('readline');
const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout,
});
let input = [];
rl.on('line', function(num) {
    input.push(num);
});
rl.on('close', () => {
    const N = parseInt(input[0]);
    const words = input.slice(1, N+1)；
    const chars = input[N+1];
    const count = {};
    let wildcards = 0;
    for(let c of chars) {
        if (c !== '?') {
            if (count[c]) {
                count[c] += 1;
            } else {
                count[c] = 1;
            }
        } else {
            wildcards++;
        }
    }
    let res = 0;
    for(let word of words) {
        const wordCount = {};
        for(let c of word) {
            if (wordCount[c]) {
                wordCount[c] += 1;
            } else {
                wordCount[c] = 1;
            }
        }
        if (canSpell(wordCount, count, wildcards)) {
            res++;
        }
    }
    console.log(res);
});
function canSpell(wordCount, count, wildcards) {
    for(let key in wordCount) {
        if (!count[key]) {
            return false;
        }
        if (wordCount[key] > count[key]) {
            wildcards -= wordCount[key] - count[key];
            if (wildcard < 0) {
                return false;
            }
        }
    }
    return true;
}