def extract_arguments(fh):
    N, M = map(int, fh.readline().strip().split())
    words = [fh.readline().strip() for _ in range(N)]
    pairs = [tuple(map(int, fh.readline().strip().split())) for _ in range(M)]
    return N, M, words, pairs

# if __name__ == "__main__":
#     input_path = sys.argv[1]
#     with open(input_path, 'r') as fh: 
#     N, M, words, pairs = extract_arguments(fh)
#     f(N, M, words, pairs)