# include<stdio.h>

int mai

# include
 int main(){
  int a=0;
  {
    int a=10;
    printf("%d",a);
    a++;
    {
     a=20;
    }
    {
      printf(" %d",a);
      int a=30; {a++;} 
      printf(" %d",a++);
    }
    printf(" %d",a++);
  }
  printf(" %d",a);
  return 0;
 }
 

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