global.stdin = () => {
	const fs = require('fs')
	const out = fs.readFileSync(0).toString()
	if (out.at(0) === '{' || out.at(0) === '[') {
		return JSON.parse(out)
	} else {
		return out
	}
}

Object.prototype.map = function(cb) {
	return cb(this)
}

String.prototype.lines = function() {
	let res = this.split("\n")
	return res.at(-1) === '' ? res.slice(0, -1) : res
}

String.prototype.reverse = function() {
	return this.split('').reverse().join('')
}