function printArray<T>(array: T[]): void {
    for (let i = 0; i < array.length; i++) {
        console.log(array[i]);
    }
}

function main() {
    const N: number = parseInt(readLine().trim(), 10);
    const arrPerson: string[] = new Array();
    const regexGmail: RegExp = /^[a-z.]+@gmail\.com$/;

    for (let NItr: number = 0; NItr < N; NItr++) {
        const firstMultipleInput: string[] = readLine().replace(/\s+$/g, '').split(' ');

        const firstName: string = firstMultipleInput[0];

        const emailID: string = firstMultipleInput[1];

        if (emailID.match(regexGmail)) {
            arrPerson.push(firstName);
        }
    }

    arrPerson.sort();
    printArray(arrPerson);
}