If A is the set of letters of the English alphabet and B is the set of letters of the Filipino alphabet, what is B-A?
A={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}
B={a,b,c,d,e,f,g,h,i,j,k,l,m,n,ñ,ng,o,p,q,r,s,t,u,v,w,x,y,z}
B-A={ñ,ng}