word = 'abaccea'
letter = 'a'

def single_remove(word, letter):
    """Remove character c from text t one at a time
    """
indexes = [c for c in range(len(word)) if word[c] == letter]
return [(word[:i] + word[i + 1:]) for i in indexes]
print(single_remove(word, letter))
Removing a character in a string one at a time