#include <cstdio>
#include <cstring>
int t = 0;
char buf[1000002];
unsigned int middleL = 0;
unsigned int middleR = 0;
void shr()
{
}
void computeNextPalindrome()
{
unsigned int bufLength = strlen(buf);
bool bufLenEven = (bufLength % 2 == 0);
middleR = bufLength / 2;
if(bufLenEven)
{
middleL = bufLength / 2 - 1;
}
else
{
middleL = bufLength / 2;
}
unsigned int i = 0;
while((middleR + i < bufLength) && (buf[middleL-i] == buf[middleR+i]))
{
i++;
}
if(buf[middleL - i] < buf[middleR + i])
{
if(bufLenEven)
{
buf[middleL]++;
buf[middleR] = buf[middleL];
}
else
{
buf[middleR]++;
}
}
else
{
buf[middleR] = buf[middleL];
}
for(; middleR + i < bufLength; i++)
{
buf[middleR + i] = buf[middleL - i];
}
}
int main()
{
scanf("%d", &t);
for(unsigned short int i = 0; i < t; i++)
{
scanf("%s", buf);
computeNextPalindrome();
printf("%s\n", buf);
}
return 0;
}
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