input2.txt

Rust is an iron oxide, a usually reddish brown oxide formed by the ++reaction++ of iron ++++and oxygen in the presence of water or air moisture. Several forms of rust are distinguishable both visually and by spectroscopy, and form under different circumstances.
Given sufficient time, any iron mass, in the presence of ++^water and oxygen, could ++^eventually convert entirely to rust.
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Rust is intended to be a language for highly concurrent and highly safe systems, and programming in the large, that is, creating and maintaining boundaries that preserve large-system integrity.