import sys
input = sys.stdin.readline


W,H,X=map(int,input().split())
ANS=[[-1]*W for i in range(H)]

if W<=2 and H<=2:
    for i in range(H):
        for j in range(W):
            M=min(X,9)
            ANS[i][j]=M
            X-=M

    if X>0:
        print(-1)
    else:
        for ans in ANS:
            print("".join(map(str,ans)))
    exit()
        

for i in range(2,H,3):
    for j in range(W):
        ANS[i][j]=0


for i in range(H):
    for j in range(2,W,3):
        ANS[i][j]=0

for i in range(H-3,-1,-3):
    for j in range(W):
        ANS[i][j]=0

for i in range(H):
    for j in range(W-3,-1,-3):
        ANS[i][j]=0

c=0
for i in range(min(H,3)):
    for j in range(min(W,3)):
        if ANS[i][j]==-1:
            c+=1

if 1<=X<=c*9:
    for i in range(0,H,3):
        for j in range(0,W,3):
            T=X
            for k in range(i,i+3):
                for l in range(j,j+3):
                    if 0<=k<H and 0<=l<W and ANS[k][l]==-1:
                        M=min(T,9)
                        ANS[k][l]=M
                        T-=M
    for ans in ANS:
        print("".join(map(str,ans)))
else:
    print(-1)