This text is missing some spaces, please add them: AnotherhighlyrecommendedreferenceisTheBigRedBookofSpanishVerbs:555FullyConjugatedVerbs.Imadeanefforttoworkthroughthisonefromcovertocover.
Another highly recommended reference is The Big Red Book of Spanish Verbs: 555 Fully Conjugated Verbs. I made an effort to work through this one from cover to cover.
input question: Fix spacing: Saturday10February,201861816854requestssinceTuesday16December,2003

output answer: Saturday 10 February, 2018 61816854 requests since Tuesday 16 December, 2003
Problem: Internationalsitesandconditions
What's a sentence that uses these characters?
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International sites and conditions
Add spaces: Thisbridgeshouldincludeasystemoftransitionaldemands,stemmingfromtoday'sconditionsandfromtoday'sconsciousnessofwidelayersoftheworkingclassandunalterablyleadingtoonefinalconclusion:theconquestofpowerbytheproletariat.

Answer: This bridge should include a system of transitional demands, stemming from today's conditions and from today's consciousness of wide layers of the working class and unalterably leading to one final conclusion: the conquest of power by the proletariat.
Finnair,UNICEFandAmadeushavejoinedforcestobenefittheworld'smostunprivilegedchildren.

Finnair, UNICEF and Amadeus have joined forces to benefit the world's most unprivileged children.
Add spaces: 4.mineraldeficiency-involvethediminishedvaluesofminerals.

Answer:
4. mineral deficiency -involve the diminished values of minerals.