if __name__ == '__main__':
    N = int(input().strip())
    gmail = []
    
    for N_itr in range(N):
        first_multiple_input = input().rstrip().split()

        firstName = first_multiple_input[0]
        emailID = first_multiple_input[1]

        domain = emailID.split("@")[1]
        
        if domain == "gmail.com":
            gmail.append(firstName)
        
    gmail.sort()
        
    for fn in gmail:
        print(fn)