program smena;
uses crt;
const
     size_row = 4;
     size_col = 7;
type
    trow = array[1..size_row] of integer;
    tmatrix = array[1..size_col] of trow;
procedure swap_cols(var mx: tmatrix;
          const i; j:integer);
   var T: trow;
   begin
     T := mx[i]; mx[i] := mx[j]; mx[j] := T
   end;
procedure print(var mxL tmatrix);
   var i,j:integer;
   begin
      for i:=1 tp size_row do
      begin
        for j:=1 to size_col do
         write(mx[j][i]:4);
        writeln
      end;
   end;
var
  mx:tmatrix;
  i,j:integer;
  n,z :integer;
begin
  for i:=1 to size_col do
    for j:=1 to size_row do begin
      write('mx[',j:2,i:2,']=');
      readln(mx[i,j];
    end;
  print(mx);
  for i:=1 to (size_col div 2) do
      swap_cols(mx,2*i-1,2*i);
  writeln;
  print(mx);
end.