MMG BASIC Compiler notes:

 This won't work   *    Solution
 ==================*==================
                   *
 DIM EOL$(1)       * ? "help": ? "me"
 EOL$=CHR$(155)    *
 ? "help";EOL$;"me"*
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                   *
 ON (X+1) GOTO 1,2 * Y=X+1
                   * ON Y GOTO 1,2
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                   *
 INPUT #1;A$,B$,C$ * INPUT #1;A$
                   * INPUT #1;B$
                   * INPUT #1;C$
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                   *
 DIM A$(20)        * Either:
 A$="X"            *  DIM A$(10)
 A$(10)="X"        *
 A$(2)=A$          * Or:
 ? A$              *  A$="XXXXXXXXXX"
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