This does the trick for me, just delete the space between -
if(isequal([album artist (auto)],multiple,8),[album artist (auto)],
if(isrange([album artist (auto)],1-9999),0-9,
if(isrange([album artist (auto)],a-b),A-B,
if(isrange([album artist (auto)],c-d),C-D,
if(isrange([album artist (auto)],e-f),E-F,
if(isrange([album artist (auto)],g-h),G H,
if(isrange([album artist (auto)],i-j),I-J,
if(isrange([album artist (auto)],k-l),K-L,
if(isrange([album artist (auto)],m-n),M-N,
if(isrange([album artist (auto)],o-p),O-P,
if(isrange([album artist (auto)],q-r),Q-R,
if(isrange([album artist (auto)],s-t),S-T,
if(isrange([album artist (auto)],u-v),U-V,
if(isrange([album artist (auto)],w-x),W-X,
Y - Z))))))))))))))