#include <stdio.h>

int main(){

    int ch = 0;
    
    setvbuf( stdin,  NULL, _IONBF, 0 );
    setvbuf( stdout, NULL, _IONBF, 0 );

    while( ch != EOF && ch != '\n') {
        ch = fgetc(stdin);
        fputc( ch, stdout );
    }
    return 0;
}

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