class Solution {
public String[] solution(String[] strArr) {
String[] answer = {};
return answer;
}
}
class Solution {
public String[] solution(String[] strArr) {
for (int i = 0; i < strArr.length; i++) {
if (i % 2 == 1) {
strArr[i] = strArr[i].toUpperCase();
} else {
strArr[i] = strArr[i].toLowerCase();
}
}
return strArr;
}
}