uppose s1 and s2 are two strings. Which of the following statements or expressions is incorrect? Select all that apply.
A) s1 + s2 - Concatenating two strings
B) s1 * 3 - Repeating the string s1 three times
C) len(s1) - Getting the length of the string s1
D) s1[2] - Accessing the third character of the string s1
E) s1 - s2 - Subtracting one string from another
