const rl = require('readline').createInterface({input: process.stdin})
const iter = rl[Symbol.asyncIterator]()
const readline = async () => (await iter.next()).value
void async function () {
    const lines = await readline()
    const reg = /^[A-Za-z0-9]+$/
    if (reg.test(lines) && lines.length >= 1 && lines.length <= 10000) {
        console.log(lines);
    } else {
        console.log('输入不符合要求');
    }
    rl.close()
}()

 京公网安备 11010502036488号
京公网安备 11010502036488号