yeah actually i removed l from the outer loop though it had no effect and m just accumulates the words that are present in the dictionary
but for cases like

valid_word(['a', 'bgkol', 'a', 'k'],'aakbgkolbgkol')
valid_word(['ab', 'a', 'bc'],'abc')

it isn't working!

this is the code above
its not passing for test cases like these:

print(valid_word(['a', 'bgkol', 'a', 'k'],'aakbgkolbgkol'))
print(valid_word(['ab', 'a', 'bc'],'abc'))

kindly review it Thanks!