/******************************************************************************
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AAAA
AAAB
AAAC
...
...
AAAZ
AABA
AABB
...
AABZ
*******************************************************************************/
#include <stdio.h>
int main()
{
char ch='A';
int i,j,c=0;
while(c<=3)
{
for(i=0;i<26;i++)
{
for(j=0;j<4;j++)
{
if(c==0)
{
if(j!=3)
printf(" %c",ch);
else
printf(" %c",ch+i);
}
else if(c==1)
{
if(j==2)
printf(" %c",ch+c);
else if(j==3)
printf(" %c",ch+i);
else
printf(" %c",ch);
}
else if(c==2)
{
if(j==1)
printf(" %c",ch+c);
else if(j==3)
printf(" %c",ch+i);
else
printf(" %c",ch);
}
else
{
if(j==0)
printf(" %c",ch+c);
else if(j==3)
printf(" %c",ch+i);
else
printf(" %c",ch);
}
}
printf("\n");
}
printf("\n");
c++;
}
return 0;
}