
Chanta? but red 5m...
3 pairs chiitotoitsu?
2 penchan ?
Hmmm... WWYD and WHY?

Who is G Uzaku?
Mahjong books author. And he is also works for other Mahjong tactics books as Proofreading.
He prefer play real mahjong rather than internet Mahjong games.
『麻雀 傑作「何切る」300 選』
300 Selected WWYD (Blue)

『麻雀定石「何切る」301選』
Mahjong established tactic 301 selected WWYD (RED)

New One!!!
『ウザク式麻雀学習 牌効率』
Uzaku Style MJ Studies "Tile Efficiency"
(GREEN)
Picked Tile efficiency related subjects from Blue and Red version and adding more.
Highly recommended for players who just started and not winning hands often.
G Uzaku also running his blog
(Slashing MJ Books! Slashing MJ games!)
Twitter: @mjbook
This is difficult to me... Too many pairs so I'd just fix the set in Pinzu by cutting 2p. I think that the lone 8m is stronger. If we draw 7m, we can discard 3s.