W,H,X=map(int,input().split())

if H==W==1:
    print(X if X<=9 else -1)
    exit()
elif H==1 and W==2:
    if X<=18:
        p=min(9,X)
        q=X-p
        print(p,q)
    else:
        print(-1)
    exit()
elif H==2 and W==1:
    if X<=18:
        p=min(9,X)
        q=X-p
        print(p,q,sep="\n")
    else:
        print(-1)
    exit()

if X>36 or H%3==0 or W%3==0:
    print(-1)
    exit()

P=[0]*4
Y=X
for i in range(4):
    a=min(Y,9)
    P[i]=a
    Y-=a

Q=[[P[0],P[1],0],[P[2],P[3],0],[0,0,0]]
R=[("{}{}{}".format(x[0],x[1],x[2]))*W for x in Q]

for i in range(H):
    print(R[i%3][:W])