LEFTOF
s = LEFTOF (s1, s2)
Returns the left part of s1 at the position of the first
occurrence of the string s2 in string s1. If
s2 does not occur in string s1, an empty
string will be returned.
Example
s1 = "abcdef"
s2 = "de"
print LEFTOF(s1, s2) ' Output: abcCode samples using LEFTOF