I dropped out of my Comp Sci program cause I disliked coding I've finally found a use case that would benefit me in real life

and wish I knew how now.
This might not be do-able in Java I dunno about VB or basic as its a large number. Also from my pseudo code below I suppose you might get that I make bash or powershell scripts still from time to time =\
I recently sent something to the states from Canada via Canadapost/USPS. I'm being bugged about tracking and when I went to use the tracking number I provided(a week later mind you) it appears I've included a typo. I no longer have the receipt and google didn't have anything for me.
Anyways heres my programming problem.
I have my typo number here: 277986102468
Can someone make me a program that takes the original number and increments each position x from 1-9 then outputs it comma seperated?
I guess it would be something along hte lines of
x= 277986102468
then(i don't know how to formulate this part)
for(loop) {
y=i77986102468 /* this loop moves i farther into the number, replacing the previous position with its original integer value, next iteration would be 2i7986102468
for (i=1; i<10; i ++) {
output += "i77986102468" + "," /* replaces i with the iteration of loop then stores it in variable output with a comma seperation. 177986102468,277986102468,377986102468 so on
}
}
$output /* prints text for copying. USPS lets me input 35 comma seperated values at a time.