import java.io.BufferedReader
import java.io.InputStream
import java.io.InputStreamReader
import java.lang.AssertionError
import java.util.*
import kotlin.math.abs
import kotlin.math.max
import kotlin.math.min

val MOD = 1_000_000_007

class Solver(stream: InputStream, private val out: java.io.PrintWriter) {
  private val reader = BufferedReader(InputStreamReader(stream), 32768)

  private val W = ni()
  private val H = ni()
  private val X = ni()
  fun solve() {
    if (!solve2()) out.println(-1)
  }

  fun solve2(): Boolean {
    if (X > 36) return false

    val ans = Array(H){IntArray(W)}
    fun build(H: Int, W: Int, A: IntArray, dst: Array<IntArray>) {
      for (row in 0 until H) {
        for (col in 0 until W) {
          if (row%3 == 2 || col%3 == 2) continue
          dst[row][col] = A[row%3 + col%3*2]
        }
      }
    }

    val H_test = if (H > 10) H%3 + 3 else H
    val W_test = if (W > 10) W%3 + 3 else W
    val ans_test = Array(H_test){IntArray(W_test)}
    fun test(H: Int, W: Int, dst: Array<IntArray>) = run {
      var ok = true
      for (i in 0 until H) {
        for (j in 0 until W) {
          var sum = 0
          for (di in -1 .. 1) {
            for (dj in -1 .. 1) {
              if (i+di in 0 until H && j+dj in 0 until W) {
                sum += dst[i+di][j+dj]
              }
            }
          }
          ok = ok && sum == X
        }
      }
      ok
    }

    for (i in 0 .. 9) {
      for (j in 0 .. 9) {
        for (k in 0 .. 9) {
          for (l in 0 .. 9) {
            if (i + j + k + l != X) continue
            val A = intArrayOf(i, j, k, l)
            build(H_test, W_test, A, ans_test)

            if (test(H_test, W_test, ans_test)) {
              build(H, W, A, ans)
              assert(test(H, W, ans))
              for (itr in ans) {
                out.println(itr.joinToString(""))
              }
              return true
            }
          }
        }
      }
    }

    return false
  }













































  private val isDebug = try {
    // なんか本番でエラーでる
    System.getenv("MY_DEBUG") != null
  } catch (t: Throwable) {
    false
  }

  private var tokenizer: StringTokenizer? = null
  private fun next(): String {
    while (tokenizer == null || !tokenizer!!.hasMoreTokens()) {
      tokenizer = StringTokenizer(reader.readLine())
    }
    return tokenizer!!.nextToken()
  }

  private fun ni() = next().toInt()
  private fun nl() = next().toLong()
  private fun ns() = next()
  private fun na(n: Int, offset: Int = 0): IntArray {
    return IntArray(n) { ni() + offset }
  }
  private fun nal(n: Int, offset: Int = 0): LongArray {
    val res = LongArray(n)
    for (i in 0 until n) {
      res[i] = nl() + offset
    }
    return res
  }

  private fun na2(n: Int, offset: Int = 0): Array<IntArray> {
    val a  = Array(2){IntArray(n)}
    for (i in 0 until n) {
      for (e in a) {
        e[i] = ni() + offset
      }
    }
    return a
  }

  private inline fun debug(msg: () -> String) {
    if (isDebug) System.err.println(msg())
  }

  private inline fun debug(a: LongArray) {
    debug { a.joinToString(" ") }
  }

  private inline fun debug(a: IntArray) {
    debug { a.joinToString(" ") }
  }

  private inline fun debug(a: BooleanArray) {
    debug { toString(a) }
  }

  private inline fun toString(a: BooleanArray) = run{a.map { if (it) 1 else 0 }.joinToString("")}

  private inline fun debugDim(A: Array<LongArray>) {
    if (isDebug) {
      for (a in A) {
        debug(a)
      }
    }
  }
  private inline fun debugDim(A: Array<IntArray>) {
    if (isDebug) {
      for (a in A) {
        debug(a)
      }
    }
  }
  private inline fun debugDim(A: Array<BooleanArray>) {
    if (isDebug) {
      for (a in A) {
        debug(a)
      }
    }
  }

  /**
   * 勝手にimport消されるのを防ぎたい
   */
  private fun hoge() {
    min(1, 2)
    max(1, 2)
    abs(-10)
  }

  private inline fun assert(b: Boolean) = run{if (!b) throw AssertionError()}
}

fun main() {
  val out = java.io.PrintWriter(System.out)
  Solver(System.`in`, out).solve()
  out.flush()
}