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String inputString is read from input. If inputString does not contain character $\text{'}$s$\text{'},$ then output "Character $\text{'}$s$\text{'}$ is not found." Otherwise, output:

"Last occurrence of character $\text{'}s\text{'}$ is at index $"$

the index of the last occurrence of $\text{'}$s$\text{'}$ in inputString

End with a newline.

Ex$.$ If the input is coffeepot, then the output is:

Character $\text{'}s\text{'}$ is not found.

Ex: If the input is ineffectiveness, then the output is:

Last occurrence of character $\text{'}s\text{'}$ is at index $14.$