$547896\mathrm{.}3737012.qx3zqy7$

Jump to level $1$

String replace is read from input. Then, string$\_$twister is read from input. If replace is in string$\_$twister, then:

Output 'Found at: $\text{'}$ followed by the index of the first occurrence.

Create a string from string$\_$twister with the first occurrence of replace replaced by $\text{'}8\text{'}$ and output string$\_$twister on a newline. $3$

Otherwise, output 'Not available'.

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