s.hoskin@xtra.co.nz said:

Thanks for piecing together the logic which can at times be difficult to decipher.

Kind wishes,

 Su. 

            __    ______    ____                      ____  
/ / | ____| / __ \ /\ |___ \
_ _ / /_ | |__ | | | | ___ / \ __) |
| | | | | '_ \ | __| | | | | / __| / /\ \ |__ <
| |_| | | (_) | | | | |__| | | (__ / ____ \ ___) |
\__,_| \___/ |_| \___\_\ \___| /_/ \_\ |____/