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  1. or download this
    1. e =~ u
    2. e =~ uae
    3. e =~ edefe
    4. e =~ ebe
    5. e =~ ec
    
  2. or download this
    e =~ u|uae|edefe|ebe|ec
  3. or download this
    11    u
    12    uau
    13    udufu
    14    ubu
    15    uc
    
  4. or download this
    111    u
    112    uau
    113    udufu
    ...
    153    ucducfuc
    154    ucbuc
    155    ucc
    
  5. or download this
    1111    u
    1112    uau
    1113    udufu
    ...
    1553    uccduccfucc
    1554    uccbucc
    1555    uccc
    
  6. or download this
    11111    u
    11112    uau
    11113    udufu
    ...
    15553    ucccducccfuccc
    15554    ucccbuccc
    15555    ucccc
    
  7. or download this
    (?:u|uau|uauau|uauauau|uauauaubu|uauauaubuau|uauauaubuauau|uauauaubuau
    +auau|uauauauc|uauauauduauauaufuauauau|
    uauauauduauaufuauau|uauauauduaufuau|uauauaudufu|uauaubu|uauaubuau|uaua
    +ubuauau|uauaubuauaubuauaubuauau|uauaubuauauc|
    uauaubuauauduauaubuauaufuauaubuauau|uauaubuaubuauaubuau|uauaubuaubuaub
    +uau|uauaubuauc|uauaubuauduauaubuaufuauaubuau|
    ...
    udufududufufudufududufududufufudufufudufududufufudufubudufududufufuduf
    +ududufududufufudufufudufududufufudufu|
    udufududufufudufududufududufufudufufudufududufufudufuc|
    udufududufufudufududufududufufudufufudufududufufudufududufududufufuduf
    +ududufududufufudufufudufududufufudufufudufududufufudufududufududufufu
    +dufufudufududufufudufu)+
    
  8. or download this
    e    $expression
    u    $unary_expression
    a    $assignment_operator
    ...
    f    :
    b    (?:\|\||&&|$bar|\^|$ampersand|$expression_equality_operator|$expr
    +ession_relational_operator|$expression_shift_operator|$plus|$minus|\*
    +|\/|%)
    c    is $built_in_type