def f(l_):
    n = []
    for q in l_:
        if q not in n:
            n.extend(q)
    return n


a = int(input())
b = int(input())
start = []
for i in range(a):
    start.append(input().split())
cut = f(start)
end = {}
for i in cut:
    cort1 = []
    cort2 = []
    for j in start:
        if i in j:
            cort1.append(start.index(j))
            cort2.append(j.index(i))
        end[i] = [tuple(cort1), tuple(cort2)]
print(end)