function solve(input) {
  let activationKey = input.shift();

  for (let i = 0; i < input.length; i++) {
    let [command, firstArgument, secondArgument, thirdArgument] = input[
      i
    ].split(">>>");

    switch (command) {
      case "Contains":
        if (activationKey.includes(firstArgument)){
          console.log(`${activationKey} contains ${firstArgument}`);
        } else {
          console.log("Substring not found!");
        }
        break;
      case "Flip":
        let temp1 = "";
        let ind2 = Number(secondArgument);
        let ind3 = Number(thirdArgument);
        let replaced = activationKey.substring(ind2, ind3);
        if (firstArgument === "Upper") {
          temp1 = activationKey.substring(ind2, ind3).toUpperCase();
          activationKey = activationKey.replace(replaced, temp1);
          console.log(activationKey);
        } else if (firstArgument === "Lower") {
          temp1 = activationKey.substring(ind2, ind3).toLowerCase();
          activationKey = activationKey.replace(replaced, temp1);
          console.log(activationKey);
        }
        break;
      case "Slice":
        let temp = "";
        index1 = Number(firstArgument);
        index2 = Number(secondArgument);
        if (
          (index1 && index2) >= 0 &&
          (index1 && index2) < activationKey.length
        ) {
          temp = activationKey.substring(index1, index2);
          activationKey = activationKey.replace(temp, "");
        }
        console.log(activationKey);
        break;
      case "Generate":
        break;
    }
  }
  console.log(`Your activation key is: ${activationKey}`);
}