Use deques rather than lists in follow_chain
Use deques rather than lists in follow_chain

meska/cobe,wodim/cobe-ng,meska/cobe,tiagochiavericosta/cobe,LeMagnesium/cobe,wodim/cobe-ng,DarkMio/cobe,pteichman/cobe,pteichman/cobe,DarkMio/cobe,tiagochiavericosta/cobe,LeMagnesium/cobe