text_plain_output_1.png
a = 'The quick brown fox jumps over the lazy dog'
b = set(a)
b

a = 'The quick brown fox jumps over the lazy dog'
b = set(a)
count = 0
for i in b:
    count = count + 1

a = 'The quick brown fox jumps over the lazy dog'
a = a.lower()
a

a = 'The quick brown fox jumps over the lazy dog'
a = a.lower()
b = set(a)
b