LO 6, Mojave

I have a list containing 990 different permutations of numbers, arranged in unbroken sets of three per cell, ranging from -3 to 7.

I want to separate each constituent number in each group of 3, in order to present the numbers so that each occurs parallel to the next, 1 per cell, 1 set per row, in a Calc spreadsheet eg. “-3-2-1” in Cell A1 is redistributed as “-3”, “-2” and “1” in cells B1, C1 and D1 respectively; “-3-20” in Cell A2 is redistruted as “-3”, “-2” and “0” in cells B1, C1 and D1 etc:

A1 B1 C1 D1

-3-2-1 -3 -2 -1

-3-20 -3 -2 0

Currently the list of permutations is in a Writer document, which I have attached for further illustration.

Can anyone recommend a quick method of completing this task? I’m a little apprehensive at the prospect of redistributing 990 different sets of numbers manually!