300852: CF162H. Alternating case

Memory Limit：256 MB Time Limit：3 S
Judge Style：Text Compare Creator：
Submit：0 Solved：0

Description

H. Alternating casetime limit per test3 secondsmemory limit per test256 megabytesinputstandard inputoutputstandard output

You are given a string consisting of alphabet letters. Convert it to alternating case: the letters on odd positions should be in uppercase, and the letters on even positions should be lowercase. The letters are numbered staring from 1.

Input

The only line of input contains a string between 1 and 100 characters long. Each character of the string is either an uppercase ('A'-'Z') or a lowercase ('a'-'z') letter.

Output

Output the resulting string.

ExamplesInput
Codeforces
Output
CoDeFoRcEs
Input
VKCup
Output
VkCuP

Input

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