var i = 1000;
var count = 0;
while(i <= 2000) {
if (i % 2 == 0 && i % 100 !=0 || i % 400 == 0) {
document.write(i, " ");
count++;
if(count % 4 == 0) {
document.write("<br/>");
}
}
i++;
}
var i = 1000;
var count = 0;
while(i <= 2000) {
if (i % 2 == 0 && i % 100 !=0 || i % 400 == 0) {
document.write(i, " ");
count++;
if(count % 4 == 0) {
document.write("<br/>");
}
}
i++;
}