This is a 31-bit commitment in Bitcoin Script.
OP_DUP
OP_TOALTSTACK
OP_DUP
<1073741824>
OP_GREATERTHANOREQUAL
OP_IF
<1073741824>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<536870912>
OP_GREATERTHANOREQUAL
OP_IF
<536870912>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<268435456>
OP_GREATERTHANOREQUAL
OP_IF
<268435456>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<134217728>
OP_GREATERTHANOREQUAL
OP_IF
<134217728>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<67108864>
OP_GREATERTHANOREQUAL
OP_IF
<67108864>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<33554432>
OP_GREATERTHANOREQUAL
OP_IF
<33554432>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<16777216>
OP_GREATERTHANOREQUAL
OP_IF
<16777216>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<8388608>
OP_GREATERTHANOREQUAL
OP_IF
<8388608>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<4194304>
OP_GREATERTHANOREQUAL
OP_IF
<4194304>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<2097152>
OP_GREATERTHANOREQUAL
OP_IF
<2097152>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<1048576>
OP_GREATERTHANOREQUAL
OP_IF
<1048576>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<524288>
OP_GREATERTHANOREQUAL
OP_IF
<524288>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<262144>
OP_GREATERTHANOREQUAL
OP_IF
<262144>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<131072>
OP_GREATERTHANOREQUAL
OP_IF
<131072>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<65536>
OP_GREATERTHANOREQUAL
OP_IF
<65536>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<32768>
OP_GREATERTHANOREQUAL
OP_IF
<32768>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<16384>
OP_GREATERTHANOREQUAL
OP_IF
<16384>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<8192>
OP_GREATERTHANOREQUAL
OP_IF
<8192>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<4096>
OP_GREATERTHANOREQUAL
OP_IF
<4096>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<2048>
OP_GREATERTHANOREQUAL
OP_IF
<2048>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<1024>
OP_GREATERTHANOREQUAL
OP_IF
<1024>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<512>
OP_GREATERTHANOREQUAL
OP_IF
<512>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<256>
OP_GREATERTHANOREQUAL
OP_IF
<256>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<128>
OP_GREATERTHANOREQUAL
OP_IF
<128>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<64>
OP_GREATERTHANOREQUAL
OP_IF
<64>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<32>
OP_GREATERTHANOREQUAL
OP_IF
<32>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<16>
OP_GREATERTHANOREQUAL
OP_IF
<16>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<8>
OP_GREATERTHANOREQUAL
OP_IF
<8>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<4>
OP_GREATERTHANOREQUAL
OP_IF
<4>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<2>
OP_GREATERTHANOREQUAL
OP_IF
<2>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DUP
<1>
OP_GREATERTHANOREQUAL
OP_IF
<1>
OP_SUB
OP_SWAP
OP_HASH256
OP_ELSE
OP_SWAP
OP_ENDIF
OP_HASH160
OP_SWAP
OP_DROP
<0x8a649c0178523b6dd9de2a15c086067434ee2128>
OP_EQUALVERIFY
OP_FROMALTSTACK
<'preimage'>
<1234567890>