const fs = require('fs')
function main(input: string): void {
    const [input1, input2] = input.split('/n')
    if (input1.split('').sort().join('') === input2.split('').sort().join('')) {
        console.log('YES')
    } else {
        console.log('NO')
    }
}

main(fs.readFileSync('/dev/stdin', 'utf8'))