numbers = list(str(52121))
n = len(numbers)
min_num = numbers[0]
s = 0
for i in range (n-1):
    for j in range (0,n-i-1):
        if numbers[j + 1] < numbers[j]:
            numbers[j], numbers[j + 1] = numbers[j + 1], numbers[j]
for number in numbers :
    if number < min_num:
        min_num = number
    if number == min_num:
        s += 1
print(s)