Pick out the word which has /spr/ or /str/, then divide them into correct columns

Pick out the word which has /spr/ or /str/, then divide them into correct columns.       

scientist

district

synthesis

desperate

dispread

guesthouse

anastrophe

customs

administration

handspring

misprice

astray

aesthetic

firsthand

abstain

administer

airstream

disproof

ancestry

espresso

/spr/

/str/

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