Add spaces: Decasfollowsbeforethe3sts:K2tog.

Answer: Dec as follows before the 3 sts: K2 tog.

Add spaces: Theylivetodaythroughouttheworld,butmainlyinEurope.

Answer: They live today throughout the world, but mainly in Europe.

Add spaces: Transportationfromtheairportmorecomfortablefromelpratisthetrain.

Answer:
Transportation from the airport more comfortable from el prat is the train.