Blockly:TEXT GET SUBSTRING START FROM END/qqq

dropdown - Indicates that the following number specifies the position (relative to the end position) of the beginning of the region of text that should be obtained from the preceding piece of text. See https://github.com/google/blockly/wiki/Text#extracting-a-region-of-text. Note: If is defined, it will automatically appear after this and any other ordinal numbers on this block.