Time units: small, medium, large 1 small=0.4 seconds 45 small=18 seconds 1 medium=45x14=630 small 1 large=85 medium 1 day≈4 large
a,b,c,d,e,f,g,h,i,j,k,l,m,n small=>"1-45", medium=>"a,b,c,d,e,f,g,h,i,j,k,l,m,n" large=>"1-4", "a,b,c,d,e,f,g" , "a,b,c,d,e,f,g,h,i,j,k,l,m,n"
