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!

l=0
for o in range(0,len(word)-l):
  
  ...

  l += 1

What you are doing with l has no effect on the for loop, in case you are relying on that somehow. You might as well write for o in range(0, len(word)):...
Also, m just keeps accumulating letters without discrimination. In the end it will simply be a concatenation of the input sequence.

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!

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