for %a in (a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z) do @(md D:\LOGS\%a&for /l %b in (1,1,100) do @copy nul D:\logs\%a\%a-%b.txt >nul)