#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int num = 0; cin >> num; for(int i = 0; i < num; i++) { char number[100] = {0}; cin >> number; int len1 = strlen(number); char one; char two = number[1]; for(int j = 0;j<len1;j++) { if(j%2 == 0) { one = number[j]; number[j] = two; } else { two = number[j]; number[j] = one; } } cout << number; } return 0; }