fileID=fopen('first3.txt','w');
fid=fopen('a.txt');
tline=fgets(fid);
tline=fgets(fid);
tline=fgets(fid);
tline=fgets(fid);
grp = textscan(tline,'%d %d %d %d %d %d %d %d %d %d %s');

tline=fgets(fid);
n1=textscan(tline,'%.4f %.4f %.4f %c %d %d %d %d %d %d %d %d %d %d %d %d');
fprintf(fileID,'   %f    %f    0.0000 %c   0 0 0 0 0 0 0 0 0 0 0 0n',double(n1{1}),...
                double(n1{2}),char(n1{4}),double(n1{5}),double(n1{6}),double(n1{7}),...
                double(n1{8}),double(n1{9}),double(n1{10}),double(n1{11}),double(n1{12}),...
                double(n1{13}),double(n1{13}),double(n1{15}),double(n1{16}));

fclose(fileID);
fclose(fid);

aaa
  bbb
ccc
  4  3  0  0  0  0  0  0  0  0 ABC
    0.0000   -0.1976    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0

0.000000    -0.197600    0.0000 C   0 0 0 0 0 0 0 0 0 0 0 0
   0.000000    0.000000    0.0000  NUL   0 0 0 0 0 0 0 0 0 0 0 0
   0.000000    0.000000    0.0000  NUL   0 0 0 0 0 0 0 0 0 0 0 0
   0.000000    0.000000    0.0000  NUL   0 0 0 0 0 0 0 0 0 0 0 0
   0.000000    0.000000    0.0000  NUL   0 0 0 0 0 0 0 0 0 0 0 0