w,h,x = map(int,input().split())
def ans(w,h,x):
    m = [[-1]]
    if x > 36:
        return m
    l = [[0]*w for i in range(h)]
    if h%3 == 0 and w%3 == 0:
        if x > 9:
            return m
        for i in range(1,h,3):
            for j in range(1,w,3):
                l[i][j] = x
    if h%3 == 0 and w % 3 == 1:
        if x > 9:
            return m
        for i in range(1,h,3):
            for j in range(0,w,3):
                l[i][j] = x
    if h%3 == 1 and w % 3 == 0:
        if x > 9:
            return m
        for i in range(0,h,3):
            for j in range(1,w,3):
                l[i][j] = x
    if h%3 == 1 and w % 3 == 1:
        if x > 9:
            return m
        for i in range(0,h,3):
            for j in range(0,w,3):
                l[i][j] = x
    if h%3 == 0 and w % 3 == 2:
        if x > 18:
            return m
        for i in range(1,h,3):
            for j in range(0,w,3):
                l[i][j] = min(9,x)
                l[i][j+1] = max(0,x-min(9,x))
    if h%3 == 2 and w % 3 == 0:
        if x > 18:
            return m
        for i in range(0,h,3):
            for j in range(1,w,3):
                l[i][j] = min(9,x)
                l[i+1][j] = max(0,x-min(9,x))
    if h%3 == 1 and w % 3 == 2:
        if x > 18:
            return m
        for i in range(0,h,3):
            for j in range(0,w,3):
                l[i][j] = min(9,x)
                l[i][j+1] = max(0,x-min(9,x))
    if h%3 == 2 and w % 3 == 1:
        if x > 18:
            return m
        for i in range(0,h,3):
            for j in range(0,w,3):
                l[i][j] = min(9,x)
                l[i+1][j] = max(0,x-min(9,x))
    if h%3 == 2 and w % 3 == 2:
        a = min(9,x)
        b = min(9,x-a)
        c = min(9,x-a-b)
        d = x-a-b-c
        for i in range(0,h,3):
            for j in range(0,w,3):
                l[i][j] = a
                l[i+1][j] = b
                l[i][j+1] = c
                l[i+1][j+1] = d
    return l
    
for i in ans(w,h,x):
    print(*i,sep="")