Envío 3651

Código

string = input()


first_char_index = 0
next_chart_index = 1
count = 0
while next_chart_index < len(string):
    current_char = string[next_chart_index]
    if string[first_char_index] == current_char:
        count += 1
        first_char_index += 1
    elif string[next_chart_index] != string[next_chart_index - 1]:
        first_char_index = 0
        count = 0
    next_chart_index += 1

print(0 if count == len(string) else count)