# https://www.globalsino.com/ICs/page4853.html
# Replace letters with indexing

string = "My name is yougui liao"

x = string.find("name")
print(x)

y = string. find('n')
print(y)

z = string.find('y', 3, 10)
print(z)


w = string.find('v', 3, 10)
print(w)


P = string.index('v', 3, 10)
print(P)