function solution(input){

    let age = Number(input.shift())


    if (age >= 0 && age <= 2) {
        console.log(`baby`)

    }else if(age >= 3 && age <= 13){
        console.log(`child`)

    }else if(age >= 14 && age <= 19){
        console.log(`teenager`)

    }else if(age >= 20 && age <= 65){
        console.log(`adult`)

    }else if(age >= 66){
        console.log(`elder`)

    }else{
        console.log(`out of bounds`)
    }

}

solution([0])