Hi all! There is a interim answer of variable length in my program:

{{0},{0},{2,3,10,11},{0}} {{1,2},{1,2,3,4},{0},{1,18}}

in internal figure brackets - coefficients of linear equations, solving which i find a desired answer. Problem - different amount of coefficients (place of brackets is important, inside brackets any number can be a coefficient of linear equation on this place). Never met such kind of problem before, need an idea - where to find, how sort it out. Sort by hands - not work, strings of this type more then 10 000, and i'm lazy - look for idea of common method...

It seemes that command like Tuples can be helpful...