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from collections import defaultdict
n, m= map(int, input().split())
a= defaultdict(list)
for _ in range(n):
a['a'].append(input().strip(' '))
for _ in range(m):
a['b'].append(input().strip(' '))
for i in a['b']:
indexes=[]
for idx, j in enumerate(a['a'], 1):
if i==j:
indexes.append(idx)
if len(indexes)>0:
print(* indexes, sep=' ')
else:
print(-1)
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DefaultDict Tutorial
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from collections import defaultdict n, m= map(int, input().split())
a= defaultdict(list) for _ in range(n): a['a'].append(input().strip(' ')) for _ in range(m): a['b'].append(input().strip(' '))
for i in a['b']: indexes=[] for idx, j in enumerate(a['a'], 1): if i==j: indexes.append(idx) if len(indexes)>0: print(* indexes, sep=' ') else: print(-1)