catalán
fila única 
Arrangement of items front to back; order that allows only one entity to pass through a point at a time.
1
There's something back to front about a lot in South Africa in fact.
2
No: the other arm: youre putting it on back to front.
3
First the thorax is stung, in its three rings, from back to front.
4
Bring right arm back to front and right, almost opening the blanket again.
5
Its seasons are beginning to look a little back to front.
6
It was like things were back to front with John, I sometimes thought.
7
The image of Aachan turned upside down and back to front.
8
She snatched another gown and put it on back to front.
9
Over the past decade, management of the health service has been back to front.
10
Politicians are seeing things back to front (not for the first time).
11
It's a back to front love story set to be turned into a film.
12
He kept turning from back to front in his saddle.
13
Should I get a side by side double buggy or back to front one?
14
If he left her to do anything, she put it on back to front.
15
But they put the middle back to front, Cryer says.
16
Happily, one redditor noticed that Apple is bringing it back to front and center.