import java.io.OutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.CharBuffer;
import java.io.IOException;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.StandardCharsets;
import java.nio.ByteBuffer;
import java.io.UncheckedIOException;
import java.nio.charset.Charset;
import java.io.Writer;
import java.util.NoSuchElementException;
import java.io.InputStream;

/**
 * Built using CHelper plug-in
 * Actual solution is at the top
 *
 * @author mikit
 */
public class Main {
    public static void main(String[] args) {
        InputStream inputStream = System.in;
        OutputStream outputStream = System.out;
        LightScanner2 in = new LightScanner2(inputStream);
        LightWriter2 out = new LightWriter2(outputStream);
        No1398 solver = new No1398();
        solver.solve(1, in, out);
        out.close();
    }

    static class No1398 {
        public void solve(int testNumber, LightScanner2 in, LightWriter2 out) {
            int w = in.ints(), h = in.ints(), x = in.ints();
            if (x > 36 || h % 3 != 2 || w % 3 != 2) {
                out.ans(-1).ln();
                return;
            }
            int[][] p = new int[3][3];
            p[0][0] = Math.min(x, 9);
            x -= p[0][0];
            p[0][1] = Math.min(x, 9);
            x -= p[0][1];
            p[1][0] = Math.min(x, 9);
            x -= p[1][0];
            p[1][1] = Math.min(x, 9);
            x -= p[1][1];
            if (x != 0) throw new RuntimeException();
            for (int i = 0; i < h; i++) {
                for (int j = 0; j < w; j++) {
                    out.print((char) ('0' + p[i % 3][j % 3]));
                }
                out.ln();
            }
        }

    }

    static abstract class LightScannerAdapter implements AutoCloseable {
        public abstract void close();

    }

    static class LightScanner2 extends LightScannerAdapter {
        private static final int BUF_SIZE = 16 * 1024;
        private final InputStream stream;
        private final byte[] buf = new byte[BUF_SIZE];
        private int ptr;
        private int len;

        public LightScanner2(InputStream stream) {
            this.stream = stream;
        }

        private void reload() {
            try {
                ptr = 0;
                len = stream.read(buf);
            } catch (IOException ex) {
                throw new UncheckedIOException(ex);
            }
        }

        private void load(int n) {
            if (ptr + n <= len) return;
            System.arraycopy(buf, ptr, buf, 0, len - ptr);
            len -= ptr;
            ptr = 0;
            try {
                int r = stream.read(buf, len, BUF_SIZE - len);
                if (r == -1) return;
                len += r;
                if (len != BUF_SIZE) buf[len] = '\n';
            } catch (IOException ex) {
                throw new UncheckedIOException(ex);
            }
        }

        private void skip() {
            while (len != -1) {
                while (ptr < len && isTokenSeparator(buf[ptr])) ptr++;
                if (ptr < len) return;
                reload();
            }
            throw new NoSuchElementException("EOF");
        }

        public int ints() {
            skip();
            load(12);
            int b = buf[ptr++];
            boolean negate;
            if (b == '-') {
                negate = true;
                b = buf[ptr++];
            } else negate = false;
            int x = 0;
            for (; !isTokenSeparator(b); b = buf[ptr++]) {
                if ('0' <= b && b <= '9') x = x * 10 + b - '0';
                else throw new NumberFormatException("Unexpected character '" + ((char) b) + "'");
            }
            return negate ? -x : x;
        }

        public void close() {
            try {
                stream.close();
            } catch (IOException e) {
                throw new UncheckedIOException(e);
            }
        }

        private static boolean isTokenSeparator(int b) {
            return b < 33 || 126 < b;
        }

    }

    static class LightWriter2 implements AutoCloseable {
        private static final int BUF_SIZE = 16 * 1024;
        private final OutputStream out;
        private final byte[] buf = new byte[BUF_SIZE];
        private int ptr;
        private boolean autoflush = false;
        private boolean breaked = true;

        public LightWriter2(OutputStream out) {
            this.out = out;
        }

        public LightWriter2(Writer out) {
            this.out = new LightWriter2.WriterOutputStream(out);
        }

        private void allocate(int n) {
            if (ptr + n <= BUF_SIZE) return;
            try {
                out.write(buf, 0, ptr);
                ptr = 0;
            } catch (IOException ex) {
                throw new UncheckedIOException(ex);
            }
            if (BUF_SIZE < n) throw new IllegalArgumentException("Internal buffer exceeded");
        }

        public void close() {
            try {
                out.write(buf, 0, ptr);
                ptr = 0;
                out.flush();
                out.close();
            } catch (IOException ex) {
                throw new UncheckedIOException(ex);
            }
        }

        public LightWriter2 print(char c) {
            allocate(1);
            buf[ptr++] = (byte) c;
            breaked = false;
            return this;
        }

        private static int countDigits(int l) {
            if (l >= 1000000000L) return 10;
            if (l >= 100000000L) return 9;
            if (l >= 10000000L) return 8;
            if (l >= 1000000L) return 7;
            if (l >= 100000L) return 6;
            if (l >= 10000L) return 5;
            if (l >= 1000L) return 4;
            if (l >= 100L) return 3;
            if (l >= 10L) return 2;
            return 1;
        }

        public LightWriter2 ans(int x) {
            allocate(12);
            if (!breaked) buf[ptr++] = ' ';
            breaked = false;

            if (x < 0) {
                buf[ptr++] = '-';
                x = -x;
            }
            int n = countDigits(x);
            for (int i = ptr + n - 1; ptr <= i; i--) {
                buf[i] = (byte) (x % 10 + '0');
                x /= 10;
            }
            ptr += n;

            return this;
        }

        public LightWriter2 ln() {
            allocate(1);
            buf[ptr++] = '\n';
            breaked = true;
            if (autoflush) {
                try {
                    out.flush();
                } catch (IOException ex) {
                    throw new UncheckedIOException(ex);
                }
            }
            return this;
        }

        private static class WriterOutputStream extends OutputStream {
            final Writer writer;
            final CharsetDecoder decoder;

            WriterOutputStream(Writer writer) {
                this.writer = writer;
                this.decoder = StandardCharsets.UTF_8.newDecoder();
            }

            public void write(int b) throws IOException {
                writer.write(b);
            }

            public void write(byte[] b) throws IOException {
                writer.write(decoder.decode(ByteBuffer.wrap(b)).array());
            }

            public void write(byte[] b, int off, int len) throws IOException {
                writer.write(decoder.decode(ByteBuffer.wrap(b, off, len)).array());
            }

            public void flush() throws IOException {
                writer.flush();
            }

            public void close() throws IOException {
                writer.close();
            }

        }

    }
}