Options VALIDVARNAME=ANY

VALIDVARNAME=V7 V6 UPCASE ANY

V7 - (default) indicates that up to 32 mixed case alphanumeric characters are allowed. Names must begin with alphabetic characters or an underscore.

V6 - only 8 bytes long.

UPCASE - variable names are uppercased.

ANY - allows any characters to appear as valid SAS variable names. Symbols, such as "=" and "*", must be contained in a 'varname'n construct.
e.g.
libname foo ......;

data foo.'My Table'n;

input 'Amount Budgeted'n 'Amount Spent'n 'Amount Difference'n;