<p>You are given a string <code>time</code> in the form of <code> hh:mm</code>, where some of the digits in the string are hidden (represented by <code>?</code>).</p>

<p>The valid times are those inclusively between <code>00:00</code> and <code>23:59</code>.</p>

<p>Return <em>the latest valid time you can get from</em> <code>time</code><em> by replacing the hidden</em> <em>digits</em>.</p>

<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>

<pre>
<strong>Input:</strong> time = &quot;2?:?0&quot;
<strong>Output:</strong> &quot;23:50&quot;
<strong>Explanation:</strong> The latest hour beginning with the digit &#39;2&#39; is 23 and the latest minute ending with the digit &#39;0&#39; is 50.
</pre>

<p><strong class="example">Example 2:</strong></p>

<pre>
<strong>Input:</strong> time = &quot;0?:3?&quot;
<strong>Output:</strong> &quot;09:39&quot;
</pre>

<p><strong class="example">Example 3:</strong></p>

<pre>
<strong>Input:</strong> time = &quot;1?:22&quot;
<strong>Output:</strong> &quot;19:22&quot;
</pre>

<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>

<ul>
	<li><code>time</code> is in the format <code>hh:mm</code>.</li>
	<li>It is guaranteed that you can produce a valid time from the given string.</li>
</ul>

class Solution:
    def maximumTime(self, time: str) -> str:

        time_list = list(time)
        for i in range(len(time_list)) :
            if time_list[i] == "?" :
                if i == 0 : time_list[i] = "2" if time_list[i+1] in "0123?" else "1"
                if i == 1 : time_list[i] = "3" if time_list[i-1] == "2" else "9"
                if i == 3 : time_list[i] = "5"
                if i == 4 : time_list[i] = "9"

        return ''.join(time_list)




















        # time = list(time)
          
        # for i in range(len(time)) :
        #     if time[i] == "?" :
        #         if i == 0 : time[i] = "2" if time[i+1] in "?0123" else "1"
        #         elif i == 1 : time[i] = "9" if time[0] in "01" else "3"
        #         elif i == 3 : time[i] = "5"
        #         else : time[i] = "9"

        # return "".join(time)
16500