nums = [8,90,19,12,7,6,55,98];

for i in range(len(nums)-1):
    key = nums[i];
    j = i-1;
    while (j >= 0 and nums[j] > key):
        nums[j+1] = nums[j];
        j -= 1;

    nums[j+1] = key;

print(nums);