Thread Subject: combining cellstrs into txt output

Hello,

I've got several cellstrings that I want to combine into
three columns and output as a .txt file with spaces
between the entries of a row.

They're essentially shaped like

A(1)={2x1 cell}
A(2)={1x1 cell}
(there a several hundred of these, but for clarity I'm
abbreviating)

B={3x1 cell}

C(1)={1x1 cell}
C(2)=(2x1 cell)

which I'd like to concatenate thes and output/save them as
text schematically like

A_1 B C_1
A_1 B C_2
A_2 B C_2

I'm having trouble doing so the output is space
delimited. Help appreciated.

Is this what you mean?

%% data set
a = {{'a1';'a2'}; {'a3'}}
b = {'b1';'b2';'b3'}
c = {{'c1'}; {'c2';'c3'}}

%% How to concatenate as follows?
% a1 b1 c1
% a2 b2 c2
% a3 b3 c3
d{1,1} = [a{1}{1} ' ' b{1} ' ' c{1}{1}];
d{2,1} = [a{1}{2} ' ' b{2} ' ' c{2}{1}];
d{3,1} = [a{2}{1} ' ' b{3} ' ' c{2}{2}]