function isEven(number) {
if (number == 1) {
return false;
}else if (number == 2) {
return true;
}else if (number == 3) {
return false;
}else if (number == 4) {
return true;
}else if (number == 5) {
return false;
}else if (number == 6) {
return true;
}else if (number == 7) {
return false;
}else if (number == 8) {
return true;
}else if (number == 9) {
return false;
}else if (number == 10) {
return true;
}else if (number == 11) {
return false;
}else if (number == 12) {
return true;
}else if (number == 13) {
return false;
}else if (number == 14) {
return true;
}else if (number == 15) {
return false;
}else if (number == 16) {
return true;
}else if (number == 17) {
return false;
}else if (number == 18) {
return true;
}else if (number == 19) {
return false;
}else if (number == 20) {
return true;
}else {
return isEven(number - 20) {
}