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-er, -ir, -ur reading
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burn
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perch
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firm
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first
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curl
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surf
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fur
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germ
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third
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whirl
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stir
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shirt
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skirt
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hurt
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sir
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twirl
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bird
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verb
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dirt
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birth
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burst
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herd
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curb
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turn
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blur
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burnt
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girl
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church
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her
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clerk
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