Petya loves lucky numbers. We all know that lucky numbers are the positive integers whose decimal representations contain only the lucky digits 4 and 7. For example, numbers 47, 744, 4 are lucky and 5, 17, 467 are not.

Petya wonders eagerly what minimum lucky number has the sum of digits equal to n. Help him cope with the task.

Input

The single line contains an integer n (1 ≤ n ≤ 106) — the sum of digits of the required lucky number.

Output

Print on the single line the result — the minimum lucky number, whose sum of digits equals n. If such number does not exist, print -1.

Examples

Input

11


Output

47


Input

10


Output

-1

from __future__ import division
import sys
from collections import namedtuple #x=namedtuple('point','x y')
from math import *
from collections import deque, OrderedDict #append #popleft
from fractions import gcd
from copy import copy ,deepcopy
from collections import Counter #Counter(list)
import re #re.split("[^a-zA-Z]",text)
# from functools import lru_cache #@lru_cache(maxsize = None)
"""
#reduce(func,list)
#map(func,list)
#filter(func,list)
#xor=lambda x,y :x^y
#sign = lambda x: math.copysign(1, x)
#list.reverse() 
#list.sort() list=sorted(list)
list.sort(key=operator.itemgetter(1,2))
#reverse word word[::-1]
#word.islower()
#word.lower() word.upper()
x = x1 if exp1 else x2
any([false,true])
all([true,false])
"a".isalpha()
"1".isdigit()
int(str,base)
"""

fin=sys.stdin ;fout=sys.stdout 
# fin=open('../in','r') ; fout=open('../out','w')
def readline():
    return fin.readline().strip()
def readstrings():
    return fin.readline().strip().split(' ')
def writeline(value):
    fout.write(str(value))
    fout.write("\n")
def read_integers():
    return [int(x) for x in fin.readline().strip().split(' ')]
def read_integer():
    return int(fin.readline().strip())
def end():
    sys.exit()

n=read_integer()
c7,c4=divmod(n,7)
for i in range(4):
    if c7-i>-1:
        c4=n-(c7-i)*7
        c4,zero=divmod(c4,4)
        if zero==0:
            writeline(('4'*c4)+('7'*(c7-i)))
            end()
writeline('-1')
        
    