I need to count or add the number of same digits in a textbox.result from textbox1, textbox2, textbox3, and textbox4. In other words if the user enters "9" in textbox1, "9" in textbox2, "4" in textbox3, and "9" in
textbox4, I need to obtain the value of "3" in textbox.result because 9 repeats 3 times. Can someone help me?
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