# a, b=input().split()
# a=int(a)
# b=int(b)
# c=0
# for i in range(a,b+1) :
# if i%3==0 :
# c=c+i
# print(c)
# 10으로 나눈 나머지==1
# a=input()
# a=int(a)
# b=0
# for i in range(1,a+1) :
# if i%10==1 :
# b=b+1
# print(b)
# a=input()
# a=int(a)
# for i in range (1, a+1) :
# if a%i==0 :
# print(i, end=' ')
# a=input()
# a=int(a)
# b=0
# for i in range (1, a+1) :
# if a%i==0 :
# b+=1
# if b<=2 :
# print('prime')
# else :
# print('not prime')
# a, b=map(int, input(). split())
# for i in range ()