Untitled

def func(string,ch,num):
    counter = num
    returned_str = ""
    for i in string:
        if ord(i) == ord(ch) and counter != 0:
            if 32 < ord(i) < 47:
                returned_str += chr(ord(i))
            else:
                returned_str += chr(ord(i)- 32)
                counter -= 1
        else:
            returned_str += chr(ord(i))
    return returned_str

def main():
    print(func("abc$","$",1))
    
main()