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Then his father took off Bob's cap quietlyhid it behind his back and said"You seeyour cap has flown away."Bob began to cry. His father said"Wellgo to the windowwhistle at once!Perhaps your cap will come back."Bob came up to the window and whistled.His father quickly put the cap back on Bob's head. Oh!It was wonderful!Bob was pleased and laughed.He quickly took his father's cap and threw it out of the window."Nowit's your turn to whistleDaddy!"