input question: Fix spacing: TheModelKreplacedthestylishLmodel,whichhadappearedintheearly20's.

output answer: The Model K replaced the stylish L model, which had appeared in the early 20's.

input question: Fix spacing: HisplanhadbeentostudywithHardy,butthisdidnotworkout,soinsteadheundertookresearchontheestimateforthedifferencebetweenconsecutiveprimessupervisedbyIngham.HoweverafterhereturnedtoLatviainJune1939WorldWarIIbrokeoutandhisstudieswereseverelyaffected.

output answer: His plan had been to study with Hardy , but this did not work out, so instead he undertook research on the estimate for the difference between consecutive primes supervised by Ingham . However after he returned to Latvia in June 1939 World War II broke out and his studies were severely affected.

input question: Fix spacing: Theoptionsdifferdependingonwhichkeyboardlanguageyou'reusing.

output answer: The options differ depending on which keyboard language you're using.

input question: Fix spacing: EachConcept2IndoorRowerincludes30yearsofexperienceinrowing.PeterandDickDreissigacker,whoparticipatedasrowersintheOlympicgamesinMunicin1972,haveestablishedtheircompanyConcept2in1976.

output answer:
Each Concept2 Indoor Rower includes 30 years of experience in rowing. Peter and Dick Dreissigacker, who participated as rowers in the Olympic games in Munic in 1972, have established their company Concept2 in 1976.