import java.util.*;class F{public static void main(String[]a){int n=0,d;for(Calendar c=new GregorianCalendar();c.get(1)<2014;c.add(2,1)){d=c.get(5);c.set(5,13);if(d<=13&&c.get(7)==6){System.out.println(c.getTime());n++;}}System.out.print(n);}}