#include <stdio.h>

#include <string.h>

#include <stdlib.h>

#include <fcntl.h>

#include <sys/stat.h>


const char LIST[] =  "0123456789abcdefghijklmnopqrstuvwxyz";


int main(int argc, char *argv[])
{

    char buffer[100];

    unsigned int count = 0;

    unsigned int j,i,c;

    int fd;



    fd = open(argv[1],O_RDONLY,S_IRUSR|S_IWUSR);


    while((read(fd,&c,1) )) {

        if ((c >= '0') && (c <= '9'))

            buffer[count++] = LIST[c-'0'];


        else if ((c >= 'a') && (c <= 'z'))

            buffer[count++] = LIST[c-'a'+10];
            
            else if ((c >= 'A') && (c <= 'Z'))

            buffer[count++] = c;


        else if (c == EOF) {

            for (i = 0; i <= count; i++)

                printf("%02x ",buffer[i]);

            for (i = 0; i <= (48-count*3); i++)

                printf(" ");
   
        printf("|| ");
   
        buffer[count] = '\n';

            for (i = 0; i <= count; i++)

                printf("%c",buffer[i]);
   
        printf("\n");

        return 0;

        }


        else {

            if (count <= 3)

                count = 0;

            else {

                for (i = 0; i <= count; i++){
 
                    printf("%02x ",buffer[i]);

                    if (((i%16) == 15) || (i == count)){

                        for (j = 0; j <= (48-(i%16)*3); j++)
                            printf(" ");

                        printf("|| ");

                        for (j = (i-(i%16)); j <= i; j++)
                            printf("%c",buffer[j]);

                        printf("\n");

                    }

                }

                count = 0;

            }

        }

    }

}