#include <stdio.h>

#define MIN_CHARACTERS 10

int main(void){
    int currchar, // current character being read
        currlinelen = 0; // length of the line being read

    int characters[MIN_CHARACTERS];

    while( ( currchar = getchar() ) != EOF){
        printf("%i\n", currlinelen);
        if(currlinelen >= MIN_CHARACTERS){ // if the minimum length is achieved, print everything until next line ('\n')

            for(int thischar = 0; thischar < MIN_CHARACTERS; ++thischar) // prints everything stored in buffer
                putchar(characters[thischar]);


            do{
                putchar(currchar);
            } while( ( currchar = getchar() ) != '\n'); // prints all next characters until a new line

            currlinelen = 0;
        }
        else{
            if(currchar == '\n'){ // if there's a new line and we the min length hasn't been achieved, reset everything
                currlinelen = 0;
                continue;
            }

            characters[currlinelen] = currchar; // stores current character in the array
            ++currlinelen;
        }
    }
}