e,f= map(int, input().split()) a,b,c=1700,1800,1900 list_a=[1,3,5,7,8,10,12] list_b=[4,6,9,11] list_c=[2] if e%4==0 and e!=a and e!=b and e!=c and f in list_c: print("29") elif e%4!=0 and f in list_b: print("30") elif e%4!=0 and f in list_a: print("31") elif e%4==0 and e==b and e==c and f in list_c: print("28")