#for a in range(1, 10):
    #for b in range(1, 10):
        #for c in range(1, 10):
            #for d in range(1, 10):
a, b, c, d = map(int, input().split())
'''
ans1 = ''

#a, b, c, d = map(int, input().split())
cnt = 0
mx = 1 << (a + b)
while(mx > cnt):
    ca = 0
    cb = 0
    cc = 0
    cd = 0
    flag = False
    for i in range(a + b):
        if(cnt & (1 << i)):
            cb += 1
        else:
            ca += 1

        if(i < a + b - 1):
            if((3 << i) & cnt == (1 << i)):
                cc += 1
            elif((3 << i) & cnt == (2 << i)):
                cd += 1

        if(ca > a or cb > b or cc > c or cd > d):
            flag = True
            break
    if(flag or ca != a or cb != b or cc != c or cd != d):
        cnt += 1
        continue
    for i in range(a + b - 1, -1, -1):
        if((1 << i) & cnt):
            ans1 += '9'
        else:
            ans1 += '3'
    break
else:
    ans1 = (-1)
'''

if(abs(c - d) > 1):
    ls = (-1)
else:
    ls = '39' * c
    if(c == d):
        ls += '3'
    if(c < d):
        ls = '9' + ls + '3'

    c3 = ls.count('3')
    c9 = ls.count('9')

    if(c3 > a or c9 > b):
        nls = ''
        for i in range(len(ls)):
            if(ls[i] == '9'):
                nls += '3'
            else:
                nls += '9'
        ls = nls
        c3, c9 = c9, c3

    if(c3 > a or c9 > b):
        ls = (-1)
    else:
        p3 = 0
        p9 = 0
        for i in range(0, len(ls)):
            if(ls[i] == '3'):
                p3 = i
                break
        for i in range(len(ls) - 1, -1, -1):
            if(ls[i] == '9'):
                p9 = i
                break
        ls = ls[:p9] + '9' * (b - c9) + ls[p9:]
        ls = ls[:p3] + '3' * (a - c3) + ls[p3:]
print(ls)
'''
if(ans1 != ls):
    print(a, b, c, d)
    print(ans1, ls)
'''