Blockly:TEXT GET SUBSTRING START FIRST/qqq
block text - Indicates that a region starting with the first letter of the preceding piece of text should be extracted. See https://github.com/google/blockly/wiki/Text#extracting-a-region-of-text. 
block text - Indicates that a region starting with the first letter of the preceding piece of text should be extracted. See https://github.com/google/blockly/wiki/Text#extracting-a-region-of-text.