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Problem D
Inverse Case
Write a program that, given a string $s$, inverts the case of every character. That is to say, if a character is in upper case, turn it into lowercase and if it is in lower case, turn it into upper case.
Input
Input consists of one line, the string $s$, which satisifes $1 \leq |s| \leq 10^3$, where $|s|$ denotes the length of the string $s$. Each character of the string, except for the trailing newline character, will have an ASCII value between 32 and 126, inclusive.
Output
Output consists of one line, containing the case-inversion of $s$.
| Sample Input 1 | Sample Output 1 |
|---|---|
Sir Henry Morton Stanley, I presume? |
sIR hENRY mORTON sTANLEY, i PRESUME? |
| Sample Input 2 | Sample Output 2 |
|---|---|
Dr. Livingstone, I presume? |
dR. lIVINGSTONE, i PRESUME? |
| Sample Input 3 | Sample Output 3 |
|---|---|
a |
A |
| Sample Input 4 | Sample Output 4 |
|---|---|
CrAzY StRiNg |
cRaZy sTrInG |
