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#1: Initial revision
# [Ruby](https://www.ruby-lang.org), 23 bytes ```ruby ->{_1.gsub /./,'\0'*_2} ``` **[Try this online!](https://ato.pxeger.com/run?1=m72kqDSpcsHiNNuYpaUlaboW23XtquMN9dKLS5MU9PX0ddRjDNS14o1qIbI3JxcopEUrJSYlK-koGMYqAIGygq6dAliECyznkZqTkw-UNYiFyUElUvJLk3JSgTJGsVCJlJT8_NLSpKScnNRUmO5MoAITsMFQRR5AkAkEUAUg_QYQeZjxEKctWAChAQ)**