why this code showing error

Question

#include <stdio.h>

int main() {
char str1[6] = "hello";
char str2[ ] = "world"; /* size 6 */
printf("str1 is: %s, str2 is: %s", str1, str2);
prinrf("size of str1 is %ld", sizeof(str1));
prinrf("size of str1 is %ld", sizeof(str2));
return 0;
}

Answer 1

printf instead of prinrf?