#include<stdio.h>
int main()
{
int i=1;
int j=6;
while(i<=4)
{
while(j>0)
{
printf("");
j--;
}
j=j-2;
int k=1;
while(k<=i)
{
printf("%d",k);
k++;
}
int l=i;
while(l>=1)
{
printf("%d",l-1);
l--;
}
printf("\n");
i++;
}
}
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