fn explore_europe(mut tune_out: bool, pre_committal: string, comment: string, reticent: bool) -> string { while !reticent { if pre_committal == "ready" { tune_out = false; println!("let's reawaken our desire to explore europe, moving past any reticence and embracing new experiences with positive comments and an open heart."); } } "exploring europe can be a journey of transformation, shedding any reticence and tuning into the vibrant cultures, history, and landscapes." }