Commit 7f97514

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Adding last exercise to flow-of-control

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	`1`	`+<?php declare(strict_types=1);`
	`2`	`+`
	`3`	`+$input = readline ('Enter letter: ');`
	`4`	`+`
	`5`	`+function phoneKeypad($letter) {`
	`6`	`+`
	`7`	`+ switch (strtoupper($letter)) {`
	`8`	`+ case "A":`
	`9`	`+ case "B":`
	`10`	`+ case "C":`
	`11`	`+ return 2;`
	`12`	`+ case "D":`
	`13`	`+ case "E":`
	`14`	`+ case "F":`
	`15`	`+ return 3;`
	`16`	`+ case "G":`
	`17`	`+ case "H":`
	`18`	`+ case "I":`
	`19`	`+ return 4;`
	`20`	`+ case "J":`
	`21`	`+ case "K":`
	`22`	`+ case "L":`
	`23`	`+ return 5;`
	`24`	`+ case "M":`
	`25`	`+ case "N":`
	`26`	`+ case "O":`
	`27`	`+ return 6;`
	`28`	`+ case "P":`
	`29`	`+ case "Q":`
	`30`	`+ case "R":`
	`31`	`+ case "S":`
	`32`	`+ return 7;`
	`33`	`+ case "T":`
	`34`	`+ case "U":`
	`35`	`+ case "V":`
	`36`	`+ return 8;`
	`37`	`+ case "W":`
	`38`	`+ case "X":`
	`39`	`+ case "Y":`
	`40`	`+ case "Z":`
	`41`	`+ return 9;`
	`42`	`+ default:`
	`43`	`+ return ' ERROR ';`
	`44`	`+ }`
	`45`	`+}`
	`46`	`+`
	`47`	`+echo "The sequence for keypad digits: $input is: ";`
	`48`	`+for ($i = 0; $i < strlen($input); $i++) {`
	`49`	`+ echo phoneKeypad($input[$i]);`
	`50`	`+`
	`51`	`+}`
	`52`	`+echo "\n";`
	`53`	`+`
	`54`	`+?>`

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