explained all similarities >3

strings/0185C0A2

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+$01 + STA $C0 + LDX#(value does not match)
+
+Instruction + some parts. Trivial - not copyrightable.

strings/20CAB44C

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+JSR $B4CA + JMP (address does not match)
+
+Instruction + some parts. Trivial - not copyrightable.

strings/534541524348494E

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+PETSCII string: SEARCHIN
+
+A single word - not copyrightable.

strings/AFC9FFD0

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+$AF + CMP #$FF + BNE (offset does not match)
+
+Instruction + some parts. Trivial - not copyrightable.

strings/F5A98085

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+$F5 + LDA #$80 + STA (zeropage address does not match) 
+
+Instruction + some parts. Trivial - not copyrightable.