import re

if __name__ == '__main__':
    N = int(input().strip())
    g_names = []

    for N_itr in range(N):
        first_multiple_input = input().rstrip().split()

        firstName = first_multiple_input[0]

        emailID = first_multiple_input[1]
        
        if re.findall('@([^ ]*)',emailID)[0] == "gmail.com": # from emailID extracting domain and chacking if it is gmail.com
            g_names.append(firstName)
    
    for name in sorted(g_names):
        print(name)