s = input()
e = input()
ss = input()
es = input()
s = int(s)
e = int(e)
ss = ss.split()
es = es.split()
sm = 0
em = 0
sv = 0
ev = 0
sm = int(sm)
em = int(em)

for i in range(s):
    ss[i] = int(ss[i])

for i in range(s):
    if sm < ss[i]:
        sm = ss[i]
        sv = i + 1

for f in range(e):
    es[f] = int(es[f])

for f in range(e):
    if em < es[f]:
        em = es[f]
        ev = f + 1

if em < sm:
    print("IGEN")
else:
    print("NEM")
    print(sv)
    print(ev)