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

Flag=1
K=(1 if H%3==2 else 0)+(1 if W%3==2 else 0)
if K==0 and X>9:
    Flag=0
elif K==1 and X>18:
    Flag=0
elif K==2 and X>36:
    Flag=0

if Flag==0:
    print(-1)
    exit()

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

h=H%3;w=W%3
if h==0:
    if w==0:
        Q=[[0,0,0],[0,a,0],[0,0,0]]
    elif w==1:
        Q=[[0,0,0],[a,0,0],[0,0,0]]
    else:
        Q=[[0,0,0],[a,b,0],[0,0,0]]
elif h==1:
    if w==0:
        Q=[[0,a,0],[0,0,0],[0,0,0]]
    elif w==1:
        Q=[[a,0,0],[0,0,0],[0,0,0]]
    else:
        Q=[[a,b,0],[0,0,0],[0,0,0]]
else:
    if w==0:
        Q=[[0,a,0],[0,b,0],[0,0,0]]
    elif w==1:
        Q=[[a,0,0],[b,0,0],[0,0,0]]
    else:
        Q=[[a,b,0],[c,d,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])