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with open('Input.txt') as file_object:
    contents = file_object.readlines()
    if '\n' in contents:
        contents.remove('\n')
print(contents)

string_to_convert = contents[0]
list_from_string = [i for i in string_to_convert]
print(list_from_string)


output_dict = {}

for letter in list_from_string:
    if letter in output_dict:
        output_dict[letter] += 1
    else:
        output_dict[letter] = 1

del output_dict['\n']

print(output_dict)

result_string = ""

for key, value in output_dict.items():
    result_string += str(key) + str(value)

print(result_string)

with open("output.txt", "w", encoding="utf-8") as f:
    f.write(result_string)