var solve = function(input){
  var ints = input.split("\n").map(parseInt);
  //        h         e         l          l              o          w          o              r          l              d
  var ans = ints[7] * ints[4] * ints[11] * (ints[11]-1) * ints[14] * ints[22] * (ints[14]-1) * ints[17] * (ints[11]-2) * ints[3];
  console.log(ans);
};

solve(require("fs").readFileSync("/dev/stdin","utf8"));