Q: Remove the spaces from the following sentence: Use the arrow keys to change lanes.
A: [Usethearrowkeystochangelanes.]

Q: Remove the spaces from the following sentence: Totally operational by the beginning of July, the Mulberry Harbour in Arromanches was to prove its worth during Montgomery's large-scale offensive against Caen later that month. During its busiest week, more than 18,000 tonnes of goods were unloaded each day.
A: [TotallyoperationalbythebeginningofJuly,theMulberryHarbourinArromancheswastoproveitsworthduringMontgomery'slarge-scaleoffensiveagainstCaenlaterthatmonth.Duringitsbusiestweek,morethan18,000tonnesofgoodswereunloadedeachday.]

Q: Remove the spaces from the following sentence: They will open on weekdays from 10-18:00 Clock every now begun. Verschiedne guides and how e.g.
A: [Theywillopenonweekdaysfrom10-18:00Clockeverynowbegun.Verschiedneguidesandhowe.g.]

Q: Remove the spaces from the following sentence: No, for safety reasons Ryanair does not permit customers to bring their own therapeutic oxygen on board aircraft.
A:
[No,forsafetyreasonsRyanairdoesnotpermitcustomerstobringtheirowntherapeuticoxygenonboardaircraft.]