#include<stdio.h>
#include<stdlib.h>

struct a
{
    char a;
    int b;

    struct a *p;
};
struct a *ptr,*head,*first,*last2;
int main()
{

    int i;
    ptr=(struct a*)malloc(sizeof(struct a));
    char k='a';
    int l=1;
    head=ptr;
    for(i=1; i<=26; i++)
    {
        ptr->a=k++;
        ptr->b=l++;


        if(i!=27)
        {

            ptr->p=(struct a*)malloc(sizeof(struct a));
            ptr=ptr->p;
        }
    }
    ptr->p=NULL;



    first=(struct a*)malloc(sizeof(struct a));

    ptr=head;
    head=first;

    first->a='A';
    first->b=96;
    first->p=ptr;



    ptr=head;
    while(ptr->p!=NULL)
    {


        printf("%c ",ptr->a);
        printf("%d\n",ptr->b);
        ptr=ptr->p;

        if(ptr->p==NULL)
        {
            last2=(struct a*)malloc(sizeof(struct a));

            last2->a='H';
            last2->b=102;
            ptr->p=last2;
            ptr=ptr->p;

            printf("%c ",ptr->a);
            printf("%d\n",ptr->b);

            break;
        }

    }








}