#georama
A,B,C,D=(int(i) for i in input().split()) 
if A+B-C>D:
    print (-1)
else:
    for i in range (A):
        s=i+2
        st="s"
        print("0 "+ st)
    for i in range (C):
        s=i+A+2-C+1
        st="s"
        print("1 "+st)
    for i in range (B-C):
        s=i+A+2
        print("1 " +s)