I can't help you with the code... but how does one loose one word?
If you still have your wallet, you can just let its show you the seed...
I wish, used the online wallet generator to create a temp address to mine to. Just noticed I mess up the mnemonic when I went to set up the wallet. Luckily, only 1 sumo is on this potentially zombie address.
Anyone know any details on what purpose the 26th word serves in the sumokoin seed mnemonic, is it a second checksum?