6(v)

#include <stdio.h>
int main()
{
    char ch[50];
    printf("Enter a string: ");
    gets(ch);
    int i;
    for (i = 0; ch[i] != '\0'; i++) {
        if ((ch[i] >= 'A' && ch[i] <= 'Z') || (ch[i] >= 'a' && ch[i] <= 'z'))
            printf("%c", ch[i]);
    }
    return 0;
}