def maxi(t):
    m = t[0]
    for x in t:
        if x[1] >= m[1]:
            m = x
    return m

L = [  ('Alice', 17), ('Barnabé', 17),
     ('Casimir', 17), ('Doriane', 17),
     ('Emilien', 14), ('Fabienne', 16)
     ]