n=0 m=0
for a in s: if a!=' ': break else: n=n+1
for b in s[::-1]: if b!=' ': break else: m=m-1
if m==0: return s[n:] else: return s[n:m]
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ahaha小菊花
n=0 m=0
for a in s: if a!=' ': break else: n=n+1
for b in s[::-1]: if b!=' ': break else: m=m-1
if m==0: return s[n:] else: return s[n:m]