import math
def pírme(szam):
    for i in range(2,szam):
        if szam%i==0:
            return False
    return True
def atlag(avg=list()):
    at=sum(zs)/len(zs)
    return at
def main():
    sz=1
    zs=[]
    primek=[]
    avg1=0
    kiir=[]
    while True:
        if sz > 0:
            sz=int(input())
            zs.append(sz)
        else:
            break
    for i in range(len(zs)):
        avg1=atlag(zs[i])
        if prime(zs[i]):
            tmp0.append(zs[i])
        for j in range(primek):
            if primek[j]<avg1:
                kiir.append(primek[j])
    print(kiir)
main()