a=z=x/25+y/15j+1j-2
# x/25 + y/15j + 1j - 2
# == x/25 - y*1j/15 + 1j - 2
# +.jcG25_cH15.j_2 1

# x => G, y => H

# nested for is
# FHU30FGU75

# so we have

# FHU30FGU75=z+.jcG25_cH15.j_2 1


# scratch !!! 
# FHU30FGU75JK+.jcG25_cH15.j_2 1=N126
# FHU30FGU75JK+.jcG25_cH15.j_2 1=N126W&>N32<K2=K+*KKJ=NtN)=k+kCN)=k+kb)k