s = 'ABCDEFGHI'
print(s[:2])
print(s[1:])
print(s[0:-2])
print(s[:])
print(s[-1:])
print(s[-5:7])
print(s[-2:-1])

5ae1bb6ce767daf9a50349bbaf4157572124bec4
<mask token>

<mask token>
print(s[:2])
print(s[1:])
print(s[0:-2])
print(s[:])
print(s[-1:])
print(s[-5:7])
print(s[-2:-1])

s = 'ABCDEFGHI'
print(s[:2])
print(s[1:])
print(s[0:-2])
print(s[:])
print(s[-1:])
print(s[-5:7])
print(s[-2:-1])
