s = int(input())
e = int(input())
ss = []
es = []
sm = 0
em = 0
sv = 0
ev = 0

for i in range(s):
    egs = int(input())
    ss.append(egs)

for f in range(e):
    ege = int(input())
    es.append(ege)

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

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)