#regular rectangular
xo=[int(i) for i in input().split()]
x=[[[0]*2]*3]
for i in range(2):
    for j in range(3):
         x[i][j]
x[0][0]=x1
z=[[0]*2]*2
nd=0
i=0
while i <3 and nd==0:
    k=i+1
    l=0
    while k!=i:
        k%=3
        for j in range(2):
            z[l][j]=x[l][j]-x[i][j]
        k+=1
        l+=1
    if z[0][0]==z[1][1] and z[0][1]==z[1][0]:
        nd=1
        for j in range(2):
            x[i][j]+=z[0][j]+z[1][j]
    i+=1
if nd==0:
    print(-1)
else:
    i-=1
    print(x[i][0]+" "+x[i][1])