string = '111111111a'
print(string[3:7])
print(string.upper())
print(string.find('j'))
print(len(string))
print(string.split('a'))
print(string.isdigit())

3c3b265f5517ecb7fdaabd1e09ba00f380a4246d
<mask token>

<mask token>
print(string[3:7])
print(string.upper())
print(string.find('j'))
print(len(string))
print(string.split('a'))
print(string.isdigit())

string = '111111111a'
print(string[3:7])
print(string.upper())
print(string.find('j'))
print(len(string))
print(string.split('a'))
print(string.isdigit())
