periksa berapa kali substring muncul dalam string
a = '128532012'
print(a.count('0'))
#Prints: 1
print(a.count('12'))
#Prints: 2
Programer boi
a = '128532012'
print(a.count('0'))
#Prints: 1
print(a.count('12'))
#Prints: 2