#include <stdio.h>
#include <malloc.h>
#include <values.h>
#include <string.h>

int get_min_length_of_world(char *string);
void change_register(char *string);
void add_space(char *string);

const int N = 200;

int main() {
    char *string = malloc(N*sizeof(char));
    printf("Enter the string: ");
    fgets(string, N, stdin);
    printf("%d\n", get_min_length_of_world(string));
    change_register(string);
    add_space(string);
    printf("%s", string);
    return 0;
}

int get_min_length_of_world(char *string){
    int min_length = INT_MAX;
    char *firstletter = string;
    char *lastletter = NULL;
    for (char *letter = string; *letter!='\0'; letter++){
        if (*letter == ' ' || *letter == '\n'){
            lastletter = letter;
            if (lastletter-firstletter < min_length)
                min_length = lastletter - firstletter;
            firstletter = letter+1;
        }
    }
    return min_length;
}
void add_space(char *string){
    char *new_string = malloc(N*sizeof(char));
    for (char *letter = string; *letter!='\0'; letter++){
        char tmp[2] = {*letter, '\0'};
        strcat(new_string, tmp);
        if (*letter == ' '){
            strcat(new_string, " ");
            letter+=1;
        }
    }
    strcpy(string, new_string);
    free(new_string);
}
void change_register(char *string){
    for (char *letter = string; *letter!=' '; letter++){
       if (*letter>='a' && *letter<='z'){
           *letter-=' ';
       }else{
           if (*letter>='A' && *letter<='Z'){
               *letter+=' ';
           }
       }
    }
}